Patent Publication Number: US-2021186745-A1

Title: Belt mounts for ostomy appliances

Description:
TECHNICAL FIELD 
     The present disclosure relates to the field of ostomy appliances for managing effluent from a stoma and relates in particular to belt mounts for attaching a belt to a wafer of an ostomy appliance. 
     BACKGROUND OF THE DISCLOSURE 
     There are many forms of ostomy appliance which try to provide a secure, comfortable fit for ostomates. 
     U.S. Pat. No. 8,945,076 describes a one-piece ostomy appliance adapted to be removably attached to a patient for receiving discharge from a stoma of the patient that includes a pouch that defines a cavity. A first opening is defined by the pouch for receiving a stoma and communicating discharge from the stoma into the cavity. The ostomy appliance also includes a face plate having a first side secured to the pouch and a second opposing side that includes an adhesive for securing the pouch to a patient. A second opening is defined by the face plate and is generally aligned with the first opening. Further, the ostomy appliance includes one or more tabs for coupling a belt thereto, wherein the one or more tabs are coupled directly to the face plate. The one or more tabs allow the pouch to be secured to a patient by a belt or other similar mechanism. 
     The present applicant has found that ostomates may find it difficult to secure an ostomy appliance to their body. This can also be the case with ostomy appliances that are provided with one or more tabs for securing to a belt or other similar mechanism. In particular, the ostomate may have difficulty in locating the one or more tabs (which may be obscured from sight during mounting by other parts of the ostomy appliance). Further, they may have difficulty in physically attaching the one or more tabs (this difficulty which may be exacerbated if the ostomate has reduced manual dexterity). Further, the process of attaching the one or more tabs to the belt or similar mechanism may not engender a feeling of security in the ostomate if they find it difficult to establish if a good connection between the one or more tabs and the belt or similar mechanism has been achieved. Further, they may face difficulties in easily detaching the one or more tabs from the belt or similar mechanism when wishing to empty or replace the ostomy appliance (this difficulty may also be exacerbated if the ostomate has reduced manual dexterity). 
     In light of this, there remains a need for a belt mount for ostomy appliances with enhanced usability for ostomates, particularly in the areas of ease of use and security of use. 
     SUMMARY OF THE DISCLOSURE 
     In this specification, the term “stomal output” refers to any gases or fluids or solids produced by an ostomate that may be secreted from the stoma or that exit the stoma. The stomal output may comprise stomal gas, stomal liquid and stomal solids. 
     In this specification, the term “stoma” refers to an opening in the body. Generally the stoma is a surgical opening in the torso of the body. In some instances, the term “stoma” also refers to internal tissue, organs or portions thereof that are exposed by the opening. By way of non-limiting example, internal tissue may be selected from colon, ileum, small intestine, large intestine, jejunum, and duodenum, and combinations thereof. The internal tissue may be an end or a loop of a small or large intestine. 
     In this specification, the term “ostomate” refers to a subject that may have use of the belt mount for an ostomy appliance disclosed herein. While ostomate usually refers to a subject with a surgical opening, as used herein, “ostomate” may refer to a subject who has a stoma, regardless of whether the stoma was created by surgery or other means. 
     The term “user” may refer to an ostomate, or to another person assisting the ostomate, for example, with emptying of the stomal output from the cavity. 
     In this specification, the ostomy appliances disclosed herein may, for example, be used for managing a stoma created by an esophagostomy, a gastrostomy, a cholecystostomy, a choledochostomy, a cecostomy, a colostomy, a duodenostomy, an ileostomy, a jejunostomy, an appendicostomy, a tracheostomy, a urostomy, a nephrostomy, an ureterostomy, or a vesicostomy. The ostomy appliances disclosed herein may be used with additional devices including, but not limited to, a shunt, a catheter, a plug or a fecal management system. 
     In this specification locations and orientations of features may be described with reference to the belt mount for an ostomy appliance being “in use”, “orientated as it would be in use” or similar. Such terms refer to the intended orientation of the belt mount for an ostomy appliance when it is secured to a body of an ostomate with the ostomate in a standing position, irrespective of whether the ostomy appliance is currently performing such a use or the actual position of the ostomate. The terms “upper” and “lower” and related terms refer to the relative position of a part or portion of the belt mount for an ostomy appliance when orientated as it would be in use. 
     Ostomy appliances are commonly attached to the body by means of a wafer which includes an adhesive layer or layers. The wafer typically comprises an adhesive layer on a body-facing side for adhering the wafer to the body of the ostomate. Typically, a release liner covers a body-facing side of the wafer that is removed by the user prior to fitting to the skin. In this specification, the term “wafer” may be used interchangeably with the terms “adapter,” “ostomy wafer,” “baseplate”, or “layered adhesive wafer.” In this specification, the term “wafer” includes wafers for a “two-piece appliance” and for a “one-piece appliance”. 
     In this specification a “two-piece appliance” refers to an appliance where the wafer forms part of a separate body fitment component that is attached by a releasable coupling to a pouch appliance. A two-piece appliance permits the body fitment component to be separated from the pouch appliance without damage, so that at least one of the parts continues to be functionally usable. For example, the body fitment component may remain in place on the body of the ostomate. In this specification a “one-piece appliance” refers to an appliance where the wafer is permanently attached to the appliance, to the extent that the wafer cannot easily be separated without risk of damaging the appliance. A one-piece appliance is intended to be used as an integral unit. In this specification, the belt mounts for ostomy appliances disclosed herein may, for example, be used with one-piece and two-piece appliances. 
     One embodiment may be a belt mount for attaching a belt to a wafer of an ostomy appliance, the belt mount having a mounting ring configured to be attached to a hook by inserting a portion of the mounting ring into a mouth of the hook and pulling the mounting ring and hook away from each other. The mounting ring at least partially surrounds a mounting aperture which accommodates at least a portion of the hook upon successful insertion of the portion of the mounting ring into the mouth of the hook. The belt mount further has a tongue that extends into the mounting aperture for contacting the hook if the mounting ring and the hook are subsequently pushed towards each other so as to resist detachment of the mounting ring from the hook. 
     Additionally or alternatively, the tongue extends in a plane that is parallel with a face of the mounting ring. The tongue also extends from a proximal end of the mounting aperture. The tongue has a concave end that is contactable with the hook if the mounting ring and the hook are pushed towards each other. 
     Additionally or alternatively, the belt mount has a clearance either side of tongue and in between the tongue and the mounting ring, and the tongue is cantilevered from a supporting portion of the belt mount. The tongue is flexible. More specifically the tongue is configured to flex and ride over a back portion of the hook on insertion of the portion of the mounting ring into the mouth of the hook. 
     Additionally or alternatively, the belt mount also has at least one protrusion that extends from at least one of a first face and a second face of the mounting ring to contact the hook when inserting the portion of the mounting ring into the mouth of the hook. The at least one protrusion is located at a distal end of the mounting ring opposite the tongue. The at least one protrusion is located adjacent an inner edge of the mounting ring. Further, the at least one protrusion has a ramped surface facing towards the mounting aperture. The at least one protrusion has a width no greater than a width of the tongue. 
     Additionally or alternatively is a system for the belt mount wherein the hook comprises a baseplate and a cantilevered hook element, wherein a mouth of the hook is defined between the baseplate and the cantilevered hook element. Further, a width of the cantilevered hook element is less than a width of the mounting aperture so as to accommodate limited rotation of the hook and the baseplate about an axis extending perpendicularly to a plane of the mounting ring. The limited rotation of the hook and the baseplate is guided by contact between a concave end of the tongue and a convex face of the cantilevered hook element. Further, the limited rotation of the hook and the baseplate is constrained by contact between the cantilevered hook element and the mounting ring. 
     Additionally or alternatively, the hook comprises a baseplate and the tongue is configured to contact the baseplate to cause at least one of a tactile feedback and an audible feedback as the tongue recovers its shape upon successful insertion of the portion of the mounting ring into the mouth of the hook. 
     Another embodiment is a belt mount for attaching a belt to a wafer of an ostomy appliance having a mounting ring which can be attached to a hook by inserting a portion of the mounting ring into a mouth of the hook. The mounting ring has at least one protrusion that extends from at least one of a first face and a second face of the mounting ring to contact the hook when inserting the portion of the mounting ring into the mouth of the hook. 
     Additionally or alternatively, at least one protrusion is configured to provide a resistance to insertion of the portion of the mounting ring into the mouth of the hook. 
     Additionally or alternatively, overcoming the resistance to insertion provided by the at least one protrusion is configured to produce at least one of a tactile feedback and an audible feedback signaling successful insertion of the portion of the mounting ring into the mouth of the hook. 
     Additionally or alternatively, the mounting ring at least partially surrounds a mounting aperture. 
     Additionally or alternatively, the at least one protrusion is located at a distal end of the mounting aperture. 
     Additionally or alternatively, the at least one protrusion is located adjacent an inner edge of the mounting ring. 
     Additionally or alternatively, the at least one protrusion comprises a ramped surface facing towards the mounting aperture. 
     Additionally or alternatively, the at least one protrusion has a width no greater than a width of the hook. 
     Additionally or alternatively, the at least one protrusion is formed from a compressible material, preferably a resilient material. 
     Additionally or alternatively, only a single protrusion extends from the first face of the mounting ring and only a single protrusion extends from the second face of the mounting ring. 
     Additionally or alternatively, both single protrusions are aligned with one another about a circumference of the mounting ring. 
     Additionally or alternatively, the hook comprises a baseplate and a cantilevered hook element, wherein a mouth of the hook is defined between the baseplate and the cantilevered hook element. 
     Additionally or alternatively, the at least one protrusion is configured to be received in an aperture in the baseplate on insertion of the portion of the mounting ring into the mouth of the hook. 
     Additionally or alternatively, the at least one protrusion received in the aperture in the baseplate is a protrusion that extends from the second face of the mounting ring. 
     Additionally or alternatively, a recess is on an underside of the cantilevered hook element, wherein the at least one protrusion is configured to be received in the recess on insertion of the portion of the mounting ring into the mouth of the hook. 
     Additionally or alternatively, the at least one protrusion received in the recess of the cantilevered hook element is a protrusion that extends from the first face of the mounting ring. 
     Additionally or alternatively, a clearance of the mouth between the baseplate and the cantilevered hook element is less in dimension than a total thickness of the mounting ring and the at least one protrusion such that insertion of the portion of the mounting ring into the mouth of the hook must be accommodated by one or more of deflection of the cantilevered hook element and compression of the at least one protrusion. 
     Additionally or alternatively, the mounting ring at least partially surrounds a mounting aperture and the mounting ring comprises at least one chamfered edge. 
     Additionally or alternatively, the at least one protrusion is located adjacent to the chamfered edge of the mounting ring. 
     Additionally or alternatively, the at least one protrusion comprises a ramped surface facing towards the mounting aperture. 
     Additionally or alternatively, wherein the ramped surface is formed as a smooth continuation of the chamfered edge. 
     Another embodiment is a belt mount for attaching a belt to a wafer of an ostomy appliance, the belt mount comprising a mounting ring which can be attached to a hook by inserting a portion of the mounting ring into a mouth of the hook and pulling the mounting ring and hook away from each other. The mounting ring at least partially surrounds a mounting aperture which accommodates at least a portion of the hook upon successful insertion of the portion of the mounting ring into the mouth of the hook. Further, the mounting ring bordering the mounting aperture has at least one chamfered edge. 
     Additionally or alternatively, the chamfered edge is on a first face of the mounting ring. 
     Additionally or alternatively, the chamfered edge comprises a U-shaped chamfered edge. 
     Additionally or alternatively, at least one protrusion that extends from at least one of a first face and a second face of the mounting ring to contact the hook when inserting the portion of the mounting ring into the mouth of the hook. 
     Additionally or alternatively, the at least one protrusion is located adjacent to the chamfered edge of the mounting ring. 
     Additionally or alternatively, the at least one protrusion comprises a ramped surface facing towards the mounting aperture. 
     Additionally or alternatively, the ramped surface is formed as a smooth continuation of the chamfered edge. 
     Additionally or alternatively, the hook comprises a baseplate and a cantilevered hook element, wherein a mouth of the hook is defined between the baseplate and the cantilevered hook element. 
     Additionally or alternatively, a clearance of the mouth between the baseplate and the cantilevered hook element is greater in dimension than a thickness of the chamfered edge of the mounting ring. 
     In one aspect the present disclosure provides a belt mount for attaching a belt to a wafer of an ostomy appliance comprising a mounting ring which can be attached to a hook by inserting a portion of the mounting ring into a mouth of the hook;
         the mounting ring comprising at least one protrusion that extends from at least one of a first face and a second face of the mounting ring to contact the hook when inserting the portion of the mounting ring into the mouth of the hook.       

     The at least one protrusion may be configured to provide a resistance to insertion of the portion of the mounting ring into the mouth of the hook. Overcoming the resistance to insertion provided by the at least one protrusion may be configured to produce at least one of a tactile feedback and an audible feedback signalling successful insertion of the portion of the mounting ring into the mouth of the hook. 
     The mounting ring may at least partially surround a mounting aperture. The at least one protrusion may be located at a distal end of the mounting aperture. The at least one protrusion may be located adjacent an inner edge of the mounting ring. The at least one protrusion may comprise a ramped surface facing towards the mounting aperture. 
     The at least one protrusion may have a width no greater than a width of the hook. The at least one protrusion may be formed from a compressible material, preferably a resilient material. 
     The belt mount may comprise only a single protrusion that extends from the first face of the mounting ring and only a single protrusion that extends from the second face of the mounting ring. Both single protrusions may be aligned with one another about a circumference of the mounting ring. 
     In another aspect the present disclosure provides a system comprising a belt mount as described above and a hook, wherein the hook comprises a baseplate and a cantilevered hook element, wherein a mouth of the hook is defined between the baseplate and the cantilevered hook element. 
     The at least one protrusion may be configured to be received in an aperture in the baseplate on insertion of the portion of the mounting ring into the mouth of the hook. The at least one protrusion received in the aperture in the baseplate may be a protrusion that extends from the second face of the mounting ring. 
     The system may further comprise a recess on an underside of the hook element, wherein the at least one protrusion may be configured to be received in the recess on insertion of the portion of the mounting ring into the mouth of the hook. The at least one protrusion received in the recess of the hook element may be a protrusion that extends from the first face of the mounting ring. 
     A clearance of the mouth between the baseplate and the cantilevered hook element may be less in dimension than a total thickness of the mounting ring and the at least one projection such that insertion of the portion of the mounting ring into the mouth of the hook must be accommodated by one or more of deflection of the cantilevered hook element and compression of the at least one projection. 
     In another aspect the present disclosure provides a belt mount for attaching a belt to a wafer of an ostomy appliance, the belt mount comprising a mounting ring which can be attached to a hook by inserting a portion of the mounting ring into a mouth of the hook and pulling the mounting ring and hook away from each other;
         the mounting ring at least partially surrounding a mounting aperture which accommodates at least a portion of the hook upon successful insertion of the portion of the mounting ring into the mouth of the hook;   the belt mount further comprising a tongue that extends into the mounting aperture for contacting the hook if the mounting ring and the hook are subsequently pushed towards each other so as to resist detachment of the mounting ring from the hook.       

     The tongue may extend in a plane of the mounting ring. The tongue may extend from a proximal end of the mounting aperture. The tongue may comprise a concave end that is contactable with the hook if the mounting ring and the hook are pushed towards each other. 
     The belt mount may further comprise a clearance either side of tongue and in between the tongue and the mounting ring, and optionally the tongue may be cantilevered from a supporting portion of the belt mount. 
     The tongue may be flexible. The tongue may be configured to flex and ride over a back portion of the hook on insertion of the portion of the mounting ring into the mouth of the hook. 
     The belt mount may further comprise at least one protrusion that extends from at least one of a first face and a second face of the mounting ring to contact the hook when inserting the portion of the mounting ring into the mouth of the hook. The at least one protrusion may be located at a distal end of the mounting ring opposite the tongue. The at least one protrusion may be located adjacent an inner edge of the mounting ring. The at least one protrusion may comprise a ramped surface facing towards the mounting aperture. The at least one protrusion may have a width no greater than a width of the tongue. 
     In another aspect the present disclosure provides a system comprising a belt mount as set out in the above aspect and a hook, wherein the hook comprises a baseplate and a cantilevered hook element, wherein a mouth of the hook is defined between the baseplate and the cantilevered hook element. 
     A width of the cantilevered hook element may be less than a width of the mounting aperture so as to accommodate limited rotation of the hook and the baseplate about an axis extending perpendicularly to a plane of the mounting ring. The limited rotation of the hook and the baseplate may be guided by contact between a concave end of the tongue and a convex face of the cantilevered hook element. Optionally, the limited rotation of the hook and the baseplate may be constrained by contact between the cantilevered hook element and the mounting ring. 
     In another aspect the present disclosure provides a belt mount for attaching a belt to a wafer of an ostomy appliance, the belt mount comprising a mounting ring which can be attached to a hook by inserting a portion of the mounting ring into a mouth of the hook and pulling the mounting ring and hook away from each other;
         the mounting ring at least partially surrounding a mounting aperture which accommodates at least a portion of the hook upon successful insertion of the portion of the mounting ring into the mouth of the hook;   wherein the mounting ring bordering the mounting aperture comprises at least one chamfered edge.       

     The chamfered edge may be on a first face of the mounting ring. The chamfered edge may comprise a U-shaped chamfered edge. 
     The belt mount may further comprise at least one protrusion that extends from at least one of a first face and a second face of the mounting ring to contact the hook when inserting the portion of the mounting ring into the mouth of the hook. The at least one protrusion may be located adjacent to the chamfered edge of the mounting ring. The at least one protrusion may comprise a ramped surface facing towards the mounting aperture. The ramped surface may be formed as a smooth continuation of the chamfered edge. 
     In another aspect the present disclosure provides a system comprising a belt mount as set out in the above aspect and a hook, wherein the hook comprises a baseplate and a cantilevered hook element, wherein a mouth of the hook is defined between the baseplate and the cantilevered hook element. A clearance of the mouth between the baseplate and the cantilevered hook element may be greater in dimension than a thickness of the chamfered edge of the mounting ring. 
     Any one of the above aspects may comprise one or more of the following:
         the ostomy appliance may be a one-piece appliance or a two-piece appliance.   the mounting aperture may be elongated in a radial direction.   the belt mount may be configured to reversibly attach the belt to the wafer.   the belt mount may be formed from a flexible material.   the mounting ring may be configured to be flexed during detachment of the portion of the mounting ring from the hook.   the belt mount may be formed from a resilient material.   the mounting ring may be configured to be more flexible than the hook.   the mounting ring may be D-shaped.   the belt mount may comprise two or more mounting rings.   the belt mount may comprise two opposed mounting rings.   the belt mount may be part of the wafer and the hook may be associated with the belt; or the belt mount may be associated with the belt and the hook may be part of the wafer.   the baseplate may further comprises an aperture; and optionally the aperture is in register with the cantilevered hook element.   an underside of the cantilevered hook element may comprises a recess.       

     In another aspect the present disclosure provides a wafer comprising a belt mount as set out in any of the above aspects. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       One or more embodiments of the disclosure will now be described, by way of example only, with reference to the accompanying drawings in which: 
         FIG. 1  illustrates a schematic representation of an ostomy appliance that comprises a wafer; 
         FIG. 2  is a top view of a wafer that comprises a belt mount having two mounting rings; 
         FIG. 3  is an enlarged view of a portion of the wafer of  FIG. 2  showing one of the mounting rings; 
         FIG. 4  is a perspective view from above of the wafer of  FIG. 2 ; 
         FIG. 5  is a cross-sectional view taken on line V-V of  FIG. 3 ; 
         FIG. 6  is a perspective view from above of one of the mounting rings of the wafer of  FIG. 2 ; 
         FIG. 7  illustrates a belt which comprises a hook at each end; 
         FIG. 8  illustrates a hook of the belt of  FIG. 7  attached to one of mounting rings of the wafer of  FIG. 2 ; 
         FIG. 9  illustrates the hook and belt mount of  FIG. 8  during the process of inserting the mounting ring into the hook; and 
         FIG. 10  illustrates the hook and belt mount of  FIG. 8  during the process of detaching the mounting ring from the hook. 
     
    
    
     DETAILED DESCRIPTION OF THE DISCLOSURE 
     In the following description, the equivalent reference numerals are used in different embodiments to denote equivalent or similar features. 
     Unless defined otherwise, all technical and scientific terms used in this specification have the same meaning as is commonly understood by the reader skilled in the art to which the claimed subject matter belongs. It is to be understood that the foregoing summary of the disclosure and the following examples are exemplary and explanatory only and are not restrictive of any subject matter claimed. 
     The following description is directed to embodiments of the disclosure. The description of the embodiments is not meant to include all the possible embodiments of the disclosure that are claimed in the appended claims. Many modifications, improvements and equivalents which are not explicitly recited in the following embodiments may fall within the scope of the appended claims. Features described as part of one embodiment may be combined with features of one or more other embodiments unless the context clearly requires otherwise. 
     In this specification, the use of the singular includes the plural unless the context clearly dictates otherwise. In this application, the use of “or” means “and/or” unless stated otherwise. Furthermore, use of the term “including” as well as other forms, such as “include”, “includes,” and “included,” is not limiting. 
     As used herein, ranges and amounts can be expressed as “about” a particular value or range. About also includes the exact amount. For example, “about 5 mm” means “about 5 mm” and also “5 mm.” Generally, the term “about” includes an amount that would be expected to be within experimental error. The term “about” includes values that are within 10% less to 10% greater of the value provided. For example, “about 50%” means “between 45% and 55%.” Also, by way of example, “about 30” means “between 27 and 33.” 
       FIG. 1  illustrates a schematic representation of an ostomy appliance  1  that comprises a wafer  2 . The ostomy appliance  1  of  FIG. 1  is shown, by way of example only, as a closed appliance. The ostomy appliance  1  may generally comprise an inner wall and an outer which may be joined together to define a cavity for containing a stomal output. The inner wall may be provided with a stomal inlet for receiving the stomal output into the cavity. The stomal inlet may be an aperture that is cut out of the inner wall. The ostomy appliance  1  of  FIG. 1  is shown schematically as a one-piece appliance wherein the wafer  2  is permanently attached to the ostomy appliance  1 , to the extent that the wafer  2  cannot easily be separated without risk of damaging the ostomy appliance  1 . However, it is to be understood that the belt mount of the present disclosure may be used with a wide range of ostomy appliances and wafers and its use is not limited to those ostomy appliances and wafers shown in the illustrated examples. Further, the general design and features of an ostomy appliance  1  will be well known to the person skilled in the art and therefore will not be described further except where necessary to explain the features of the belt mount of the present disclosure. 
     In the following description the present disclosure will be described, by way of example only, with one or more mounting rings  11  of the belt mount  5  forming part of the wafer  2  and which are configured to be attached to one or more hooks forming part of a belt  40 . However, it will be appreciated that this configuration may be reversed such that the one or more hooks are formed as part of the wafer  2  and one or more mounting rings  11  are formed as part of the belt  40 . 
       FIGS. 2 to 4  illustrate an example of the wafer  2  comprising a belt mount  5 . The wafer  2  comprises a body  3  that may be annular in shape. The body  3  may surround an aperture  4 . The aperture  4  may be aligned in use with the stomal inlet in the inner wall of the ostomy appliance  1 . As best seen in  FIG. 4 , the body  3  may comprise a peripheral region  6  which may be flat and a convex region  7  which may extend upwards out of the plane of the peripheral region  6 . An inner edge of the convex region  7  may define the aperture  4 . 
     The peripheral region  6  may have a width of 6 to 18 mm and a thickness of 0.75 to 1.00 mm, optionally 0.80 mm. The convex region  7  may have a thickness of 1 to 3 mm, optionally 1.40 mm, 2.00 mm, or 2.65 mm. The aperture  4  may have a diameter of 25 to 60 mm. 
     The wafer  2  may be provided with the belt mount  5 . The belt mount  5  may be integrally formed as part of the wafer  2  or may be one or more separate components which are joined to a main part of the wafer  2 . The belt mount  5  may comprise one or more mounting rings  11  (which may also be referred to as ‘tabs’). The belt mount  5  may comprise two, three or more mounting rings  11 . The one or more mounting rings  11  may be arranged at different locations around a circumference of the body  3 . Two of the one or more mounting rings  11  may be disposed opposite one another, for example 180° apart around the circumference of the body  3 . Where a third mounting ring  11  is present this may be located at an acute angle to one of the other two mounting rings  11  and at an obtuse angle to the other of the other two mounting rings  11 . 
     Where two or more mounting rings  11  are present they may have the same shape, size and configuration as each other. 
     The or each mounting ring  11  may protrude from the body  3 . The or each mounting ring  11  may protrude outwards from the body  3 . The or each mounting ring  11  may be oriented generally along a radial line that extends from a centre of the aperture  4 . The or each mounting ring  11  may generally lie in the plane of the peripheral region  6  as best seen in  FIG. 4 . 
     As shown in  FIGS. 2 and 3 , the or each mounting ring  11  may comprise a distal end  15  furthest from the body  3  and a proximal end  16  closest to the body  3 . The proximal end  16  may directly join or merge with the peripheral region  6  of the body  3 . A support region  14  may be defined at or near the proximal end  16  which supports a remainder of the mounting ring  11  which may extend away from the support region  14  in a cantilevered manner. 
     The or each mounting ring  11  may comprise a first leg  18  and a second leg  19  which may extend from the proximal end  16  towards the distal end  15 . A proximal end of each of the first leg  18  and the second leg  19  may be joined to or merge with the support region  14 . A distal end of each of the first leg  18  and the second leg  19  may be joined to or merge with opposite ends of an end portion  17  of the mounting ring  11 . The first leg  18  and the second leg  19  may both be straight. The end portion  17  may be rounded, optionally semi-circular in shape. The first leg  18 , second leg  19  and end portion  17  may together define a mounting ring  11  that is D-shaped as most clearly seen in  FIG. 3 . The or each mounting ring  11  may be a unitary part, optionally a unitary moulded part. Optionally, the body  3  and all of the one or more mounting rings  11  of the wafer may be a unitary part, optionally a unitary moulded part. 
     The belt mount  5  may be formed from a flexible material. Optionally the belt mount  5  is formed from a material that is resilient. Optionally the whole of the wafer  2  including the belt mount  5  is formed from a flexible and/or resilient material. For example, the material of at least the belt mount  5  may be a polymer or co-polymer. In one example the material may be ethylene-vinyl acetate (EVA). 
     The first leg  18 , second leg  19  and end portion  17  may together surround and at least partially define a mounting aperture  12 . The mounting aperture  12  may be elongated in a radial direction. A width w 1  of the mounting aperture  12  may be 4 to 8 mm, optionally 6 mm. 
     The or each mounting ring  11  may further comprise a tongue  13  as shown in  FIG. 3 . The tongue  13  may extend from a support portion  23  into the mounting aperture  12 . The support portion  23  may be part of or adjacent the support region  14 . The length of the tongue  13  may be less than a length (in the radial direction) of the mounting aperture  12  such that a distal end of the tongue  13  does not reach into contact with the end portion  17  of the mounting ring  11 . As such, due to the presence of the tongue  13 , an available opening of the mounting aperture  12  may have a length l 1  as shown in  FIG. 3 . 
     Optionally, as shown in the example of  FIG. 3 , the length of the tongue  13  may be less than 50% of the length of the mounting aperture  12 . The distal end of the tongue  13  may comprise a concave face  24  as seen in  FIG. 3 . 
     A width of the tongue  13  may be less than a width of the mounting aperture  12  between the first leg  18  and the second leg  19 . A width w 3  of the tongue  13  may be 2 to 6 mm, optionally 4 mm. Thus, a first clearance  20  and a second clearance  21  may be formed between either side of the tongue  13  and the first leg  18  and the second leg  19 . Each clearance  20 ,  21  may have a width of 1 mm. 
     The tongue  13  may be flexible. In particular, the tongue  13  may be flexed about the support portion  23  such that the distal end of the tongue is moved out of the plane of the mounting ring  11  as will be described further below. 
     As seen in  FIGS. 4 and 5 , the or each mounting ring  11  may be generally thin. The or each mounting ring  11  may have the same thickness or a greater thickness than that of the peripheral region  6 . The general thickness of the mounting ring  11  maybe 1.0 to 1.5 mm, optionally 1.3 mm. 
     A first face  9  of the or each mounting ring  11  and a second face  10  of the or each mounting ring  11  may be parallel to one another over a majority of their area. The first leg  18 , second leg  19  and tongue  13  may have the same thickness as each other. A thickness t 3  of the tongue  13  may be 1.0 to 1.5 mm, optionally 1.3 mm. The thickness of the end portion  17  of the or each mounting ring  11  may be the same as that of the tongue  13  except for the provision of one or more protrusions  25 ,  26  as will be described further below. 
     At least a portion of an inner edge  27  of the or each mounting ring  11  may comprise a chamfered edge. A chamfer may be provided at an inner edge of the first leg  18 , the second leg  19  and/or the end portion  17 . A chamfer may be provided at the first face  9  and/or the second face  10 . In the example of  FIG. 5 , a first chamfer  30  is provided at the first face  9  of the inner edge  27  around the full extent of the first leg  18 , the second leg  19  and the end portion  17 . The first chamfer  30  may extend around a U-shape. Likewise a second chamfer  31  is provided at the second face  10  of the inner edge  27  around the full extent of the first leg  18 , the second leg  19  and the end portion  17 . The second chamfer  31  may extend around a U-shape. 
     The or each mounting ring  11  may further comprise at least one protrusion  25 ,  26  that extends from at least one of the first face  9  and the second face  10  of the or each mounting ring  11 . The or each mounting ring  11  may comprise only a first protrusion  25  that extends from the first face  9  but no protrusion on the second face  10 . Alternatively, the or each mounting ring  11  may comprise only a second protrusion  26  that extends from the second face  10  but no protrusion on the first face  9 . Alternatively, the or each mounting ring  11  may comprise both a first protrusion  25  that extends from the first face  9  and a second protrusion  26  that extends from the second face  10 , as most clearly seen in the example of  FIG. 5 . In the later example, optionally the first protrusion  25  and second protrusion  26  are configured as mirror-images of each as reflected in the plane of the mounting ring  11 . Also optionally the first protrusion  25  and second protrusion  26  may be aligned with one another about a circumference of the mounting ring  11 . 
     As best seen in  FIG. 5 , the thickness t 1  of the first protrusion  25  and or the second protrusion  26  may be 0.4 to 0.6 mm, optionally 0.5 mm. The total thickness t 2  of the mounting ring  11  at the location of the first protrusion  25  and or second protrusion  26  may be 1.8 to 2.7 mm, optionally 2.3 mm 
     As most clearly seen in  FIG. 6 , the first protrusion  25  and or the second protrusion  26  may be located at the distal end  15  of the mounting ring  11  and/or at the distal end of the mounting aperture  12 . Optionally, the first protrusion  25  and or the second protrusion  26  may be located opposite the tongue  13 . The first protrusion  25  and or the second protrusion  26  may be located adjacent to the inner edge  27 . 
     The first protrusion  25  and or the second protrusion  26  may each comprise a ramped surface  32 ,  33  facing towards the mounting aperture  12 . The first protrusion  25  may comprise a first ramped surface  32  that faces towards the mounting aperture  12 . The first ramped surface  32  may be formed as a smooth continuation of the first chamfer  30  as shown in  FIG. 6 . Likewise, the second protrusion  26  may comprise a second ramped surface  33  that faces towards the mounting aperture  12 . The second ramped surface  33  may be formed as a smooth continuation of the second chamfer  31 . 
     The first protrusion  25  and or the second protrusion  26  may be formed from a compressible material, optionally a resilient material. The material of the first protrusion  25  and or the second protrusion  26  may be the same as that of the remainder of the mounting ring  11 . Optionally the first protrusion  25  and or the second protrusion  26  are integrally formed with a remainder of the mounting ring  11 , for example as an integrally moulded part. 
     The first protrusion  25  and or the second protrusion  26  may have a width no greater than a width of the tongue  13 . The first protrusion  25  and or the second protrusion  26  may have a width that is less than a width of the tongue  13 . A width w 2  of the first protrusion  25  and or the second protrusion  26  may be 2.5 to 3.5 mm, optionally 3.0 mm. 
       FIG. 7  illustrates a belt  40  which comprises a strap  41  having a hook  42  at each end. Each hook  42  may comprise a baseplate  43  and a cantilevered hook element  44 . The cantilevered hook element  44  may comprise a support portion  50  that may have a convex face  47  and a projecting portion  51  that extends from the support portion  50 . The projecting portion  51  may have a length  12 . Optionally the length l 2  of the projecting portion  51  is longer than the length l i  of the available opening of the mounting aperture  12 . 
     A mouth  45  of the hook  42  may be defined between the baseplate  43  and the cantilevered hook element  44 , in particular between the baseplate  43  and the projecting portion of the cantilevered hook element  44 . The hook  42 , as shown in  FIGS. 7 and 8 , is ‘reverse-directed’ in that the mouth  45  of the hook  42  faces away from the wafer  2  when attached to the belt mount  5  as seen in  FIG. 8 . 
     The baseplate  43  may comprise an aperture  46 . Optionally the aperture  46  is in register with the cantilevered hook element  44 , e.g. located directly below the cantilevered hook element  44 . Optionally the aperture  46  is of the same or substantially the same shape and size (in plan view) as the cantilevered hook element  44 . An underside of the cantilevered hook element  44  may comprises a recess. 
     In use, the belt mount  5  may be used for attaching the belt  40  to the wafer  2  of the ostomy appliance  1 . To do so for the illustrated example, the ostomate or user may attach a first hook  42  of belt  40  to a first mounting ring  11  of the belt mount  5  of the wafer  2 , pass the strap  41  around the torso, limb or other body part of the ostomate, and then attach a second hook  42  of the belt  40  to a second mounting ring  11  of the belt mount  5  of the wafer  2 . The strap  41  may then be tightened as required. 
     The or each mounting ring  11  may be attached to the hook  42  by inserting a portion of the mounting ring  11  into the mouth  45  of the hook  42  to achieve the state shown in  FIG. 8 . 
     Insertion may be achieved by inserting the portion of the mounting ring  11  into the mouth  45  of the hook  42  and pulling the hook  42  and the mounting ring  11  away from each other, due to the hook  42  being reverse-directed. Optionally the portion of the mounting ring  11  that is inserted is the end portion  17 . As shown in  FIG. 9 , to insert the end portion  17  of the mounting ring  11 , the wafer  2  may be angled relative to the baseplate  43  and the mounting ring  11  may be flexed. 
     The size and shape of the mounting ring  11 , for example the thickness of one or more portions of the mounting ring  11 , may be configured relative to the size and shape of the hook  42  to ensure that there is contact between the mounting ring  11  and the hook  42  when inserting the portion of the mounting ring  11  into the mouth  45  of the hook  42 . 
     The thickness t 3  of the first leg  18  and the second leg  19  may be less than a clearance of the mouth  45 . However, the thickness t 1  of the first protrusion  25  and or the second protrusion  26  may result in the total thickness t 2  of the mounting ring  11  at the location of the first protrusion  25  and or second protrusion  26  being greater than the clearance of the mouth  45 . In this way, the first protrusion  25  and or the second protrusion  26  may be configured to provide a resistance to insertion of the end portion  17  of the mounting ring  11  into the mouth  45  of the hook  42 . In particular, during insertion, the first protrusion  25  that extends from the first face  9  may contact the projecting portion  51  of the cantilevered hook element  44 . Additionally or alternatively, the second protrusion  26  that extends from the second face  10  may contact the baseplate  43  at or near the aperture  46 . 
     The hook  42  may be engaged with the mounting ring  11  from either side, e.g. with the hook element  44  entering the mounting aperture  12  from either the side of the first face  9  or from the side of the second face  10 . 
     The first chamfer  30  and or the second chamfer  31  may ease insertion of the mounting ring  11  into the hook  42 . 
     The projecting portion  51  may make first contact with the first ramped surface  32  of the first protrusion  25 . The angle of the first ramped surface  32  may tend to urge the projecting portion  51  to flex upwards. Alternatively, the projecting portion  51  may make first contact with the second ramped surface  33  of the second protrusion  26  when the hook element  44  is attached from the other side of the mounting ring  11 . The angle of the second ramped surface  33  may tend to urge the projecting portion  51  to flex upwards 
     The first protrusion  25  and or the second protrusion  26  may have a width no greater than a width of the hook  42 . 
     As best seen in  FIG. 9 , during insertion the tongue  13  may make contact with the hook element  42  as the end portion  17  is contacted with the projecting portion  51 . Optionally, the tongue  13  may be configured to flex and ride over a back  48  of the projecting portion  51  on insertion of the end portion  17  of the mounting ring  11  into the mouth  45  of the hook  42 . Optionally this may be due to the length l 2  of the projecting portion  51  being longer than the length l 1  of the available opening of the mounting aperture  12 . 
     Overcoming the resistance to insertion provided by the first protrusion  25  and or the second protrusion  26  may be achieved by the ostomate or user pulling harder on the strap  41 . Passage of the end portion  17  into the hook  42  may be accommodated by one or more of compression of the material of the first protrusion  25  and or the second protrusion  26  and deflection upwards of the projecting portion  51  of the cantilevered hook element  44 . 
     Optionally both the mounting ring  11  and the hook  42  are formed of resilient materials such that the first protrusion  25  and or the second protrusion  26  and the cantilevered hook element  44  recover their shapes after insertion. Optionally, at the same time the tongue  13  may complete its passage over the back  48  of the projecting portion  51 . 
     Advantageously, the configuration of the belt mount  5  may produce at least one of a tactile feedback and an audible feedback signalling successful insertion of the end portion  17  of the mounting ring  11  into the mouth  45  of the hook  42 . The tactile and or audible feedback may result from one or more of the tongue  13  coming out of contact with the hook element  42 , the tongue  13  subsequently hitting the baseplate  43  as it resiliently recovers its shape, and the end portion  17  ‘popping through’ the mouth  45  of the hook element and hitting the support portion  50  of the hook element  42 . 
     In the attached position, the second protrusion  26  may be received in the aperture  46  of the baseplate  43 . The first protrusion may be received in the recess on the underside of the cantilevered hook element  44 . 
     In the attached position, the concave face  24  of tongue  13  may also be separated from the convex face  47  of the hook element  44  by a small gap. This may allow a small amount of play between the hook  42  and the belt mount  5 . However, optionally the gap is small enough that if the hook  42  and belt mount  5  are simply pulled part the concave face  24  will contact the convex face  47  while the second protrusion  26  is still received in the aperture  46  of the baseplate  43 . Thus, abutment between the concave face  24  and the convex face  47  may act to hinder detachment of the belt mount  5  from the hook  42  by means of a linear compressive force. 
     The concave face  24  may be shaped to cooperate with the convex face  47  to guide the hook  42  in limited rotation within the belt mount  5 . For example, a width of the cantilevered hook element  44  may be less than the width w 1  of the mounting aperture  12  so as to accommodate limited rotation of the hook  42  and the baseplate  43  about an axis extending perpendicularly to a plane of the mounting ring  11 . The limited rotation of the hook  42  and the baseplate  43  may be guided by contact between the concave face  24  of the tongue  13  and the convex face  47  of the cantilevered hook element  44 . Optionally, the limited rotation of the hook  42  and the baseplate  43  may be constrained by contact between the cantilevered hook element  44  and the mounting ring  11 . For example the rotation may be constrained by contact of the support portion  50  with the first leg  18  and or second leg  19  of the mounting ring  11 . 
     Detachment of the hook  42  from the mounting ring  11  is shown in  FIG. 10 . Optionally the wafer  2  and the hook  42  are angled relative to one another, for example by rotating the wafer  2  and mounting ring  11  around an effective pivot point located at the distal end  15  of the mounting ring  11  such that the tongue  13  is raised clear of the cantilevered hook element  44 . The hook  42  and the mounting ring  11  may thereafter be separated from one another by pushing the two components together which causes the end portion  17  of the mounting ring  11  to be pushed out of the mouth  45 . Similar to the process of insertion, the movement of detachment may be accommodated by one or more of compression of the material of the first protrusion  25  and or the second protrusion  26  and deflection upwards of the projecting portion  51  of the cantilevered hook element  44 . 
     Examples 
     The following table presents example configurations of a wafer  2  comprising a belt mount  5  according to the present disclosure. These examples are not intended to be limiting on the present disclosure in any way or to limit the scope of the appended claims. Rather, the examples are provided to aid a better understanding of the present disclosure. 
     The examples refer to features described in further detail elsewhere in the present disclosure. The skilled reader will understand that reference should be made to said further description where necessary for a fuller understanding of the examples. Where said further description refers to optional characteristics of said features then the skilled reader will understand that the following examples may optionally also include one or more of said optional characteristics. 
     In the following examples, each mounting ring  11  has a configuration as shown in  FIG. 3  and comprising:
         t 1 =0.5 mm   t 2 =2.3 mm   t 3 =1.3 mm   a thickness of peripheral region  6 =0.8 mm   w 1 =6 mm   w 2 =3 mm   w 3 =4 mm   A first protrusion  25  and a second protrusion  26 .       

     In the following examples, each wafer  2  has two opposed mounting rings  11 . As an alternative, the examples may also be provided with a third mounting ring  11  of the same shape and configuration. 
     
       
         
           
               
               
               
               
               
               
             
               
                   
               
               
                   
                 Maximum 
                   
                   
                   
                   
               
               
                   
                 dimension 
                   
                   
                   
                 Thickness  
               
               
                   
                 between 
                   
                   
                 Diameter  
                 of 
               
               
                   
                 distal ends of 
                 Diameter 
                 Width of 
                 of 
                 convex 
               
               
                   
                 mounting 
                 of 
                 peripheral 
                 aperture  
                 region 
               
               
                 Example 
                 rings 
                 body 3 
                 region 6 
                 4 
                 7 
               
               
                 No. 
                 (mm) 
                 (mm) 
                 (mm) 
                 (mm) 
                 (mm) 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
            
               
                 1 
                 115 
                 89 
                 7.5 
                 58 
                 2.00 
               
               
                 2 
                 110 
                 80 
                 6.5 
                 48 
                 2.65 
               
               
                 3 
                 110 
                 80 
                 11.5 
                 38 
                 2.65 
               
               
                 4 
                 110 
                 80 
                 16.5 
                 28 
                 2.65 
               
               
                 5 
                 115 
                 89 
                 8 
                 58 
                 1.40 
               
               
                 6 
                 110 
                 80 
                 8 
                 48 
                 1.40 
               
               
                 7 
                 110 
                 80 
                 8 
                 38 
                 1.40 
               
               
                 8 
                 110 
                 80 
                 8 
                 28 
                 1.40 
               
               
                   
               
            
           
         
       
     
     Further aspects of the present disclosure are set out in the following clauses. 
     CLAUSES 
     A1. A belt mount for attaching a belt to a wafer of an ostomy appliance comprising a mounting ring which can be attached to a hook by inserting a portion of the mounting ring into a mouth of the hook;
         the mounting ring comprising at least one protrusion that extends from at least one of a first face and a second face of the mounting ring to contact the hook when inserting the portion of the mounting ring into the mouth of the hook.       

     A2. The belt mount of clause A1, wherein the at least one protrusion is configured to provide a resistance to insertion of the portion of the mounting ring into the mouth of the hook. 
     A3. The belt mount of clause A2, wherein overcoming the resistance to insertion provided by the at least one protrusion is configured to produce at least one of a tactile feedback and an audible feedback signalling successful insertion of the portion of the mounting ring into the mouth of the hook. 
     A4. The belt mount of any one of clauses A1 to A3, wherein the mounting ring at least partially surrounds a mounting aperture. 
     A5. The belt mount of clause A4, wherein the at least one protrusion is located at a distal end of the mounting aperture. 
     A6. The belt mount of clause A4 or clause A5, wherein the at least one protrusion is located adjacent an inner edge of the mounting ring. 
     A7. The belt mount of any one of clauses A4 to A6, wherein the at least one protrusion comprises a ramped surface facing towards the mounting aperture. 
     A8. The belt mount of any one of clauses A1 to A7, wherein the at least one protrusion has a width no greater than a width of the hook. 
     A9. The belt mount of any one of clauses A1 to A8, wherein the at least one protrusion is formed from a compressible material, preferably a resilient material. 
     A10. The belt mount of any one of clauses A1 to A9, which comprises only a single protrusion that extends from the first face of the mounting ring and only a single protrusion that extends from the second face of the mounting ring. 
     A11. The belt mount of clause A10, wherein both single protrusions are aligned with one another about a circumference of the mounting ring. 
     A12. A system comprising a belt mount as set out in any one of clauses A1 to A11 and a hook, wherein the hook comprises a baseplate and a cantilevered hook element, wherein a mouth of the hook is defined between the baseplate and the cantilevered hook element. 
     A13. The system of clause A12, wherein the at least one protrusion is configured to be received in an aperture in the baseplate on insertion of the portion of the mounting ring into the mouth of the hook. 
     A14. The system of clause A13, wherein the at least one protrusion received in the aperture in the baseplate is a protrusion that extends from the second face of the mounting ring. 
     A15. The system of any one of clauses A12 to A14, further comprising a recess on an underside of the hook element, wherein the at least one protrusion is configured to be received in the recess on insertion of the portion of the mounting ring into the mouth of the hook. 
     A16. The system of clause A15, wherein the at least one protrusion received in the recess of the hook element is a protrusion that extends from the first face of the mounting ring. 
     A17. The system of any one of clauses A12 to A16, wherein a clearance of the mouth between the baseplate and the cantilevered hook element is less in dimension than a total thickness of the mounting ring and the at least one projection such that insertion of the portion of the mounting ring into the mouth of the hook must be accommodated by one or more of deflection of the cantilevered hook element and compression of the at least one projection. 
     B1. A belt mount for attaching a belt to a wafer of an ostomy appliance, the belt mount comprising a mounting ring which can be attached to a hook by inserting a portion of the mounting ring into a mouth of the hook and pulling the mounting ring and hook away from each other;
         the mounting ring at least partially surrounding a mounting aperture which accommodates at least a portion of the hook upon successful insertion of the portion of the mounting ring into the mouth of the hook;   the belt mount further comprising a tongue that extends into the mounting aperture for contacting the hook if the mounting ring and the hook are subsequently pushed towards each other so as to resist detachment of the mounting ring from the hook.       

     B2. The belt mount of clause B1, wherein the tongue extends in a plane of the mounting ring. 
     B3. The belt mount of clause B1 or clause B2, wherein the tongue extends from a proximal end of the mounting aperture. 
     B4. The belt mount of any one of clauses B1 to B3, wherein the tongue comprises a concave end that is contactable with the hook if the mounting ring and the hook are pushed towards each other. 
     B5. The belt mount of any one of clauses B1 to B4, further comprising a clearance either side of tongue and in between the tongue and the mounting ring, and optionally the tongue is cantilevered from a supporting portion of the belt mount. 
     B6. The belt mount of any one of clauses B1 to B5, wherein the tongue is flexible. 
     B7. The belt mount of any one of clauses B1 to B6, wherein the tongue is configured to flex and ride over a back portion of the hook on insertion of the portion of the mounting ring into the mouth of the hook. 
     B8. The belt mount of any one of clauses B1 to B7, further comprising at least one protrusion that extends from at least one of a first face and a second face of the mounting ring to contact the hook when inserting the portion of the mounting ring into the mouth of the hook. 
     B9. The belt mount of clause B8, wherein the at least one protrusion is located at a distal end of the mounting ring opposite the tongue. 
     B10. The belt mount of clause B8 or clause B9, wherein the at least one protrusion is located adjacent an inner edge of the mounting ring. 
     B11. The belt mount of any one of clauses B8 to B10, wherein the at least one protrusion comprises a ramped surface facing towards the mounting aperture. 
     B12. The belt mount of any one of clauses B8 to B11, wherein the at least one protrusion has a width no greater than a width of the tongue. 
     B13. A system comprising a belt mount as set out in any one of clauses B1 to B12 and a hook, wherein the hook comprises a baseplate and a cantilevered hook element, wherein a mouth of the hook is defined between the baseplate and the cantilevered hook element. 
     B14. The system of clause B13, wherein a width of the cantilevered hook element is less than a width of the mounting aperture so as to accommodate limited rotation of the hook and the baseplate about an axis extending perpendicularly to a plane of the mounting ring. 
     B15. The system of clause B14, wherein the limited rotation of the hook and the baseplate is guided by contact between a concave end of the tongue and a convex face of the cantilevered hook element; and
         wherein the limited rotation of the hook and the baseplate is constrained by contact between the cantilevered hook element and the mounting ring.       

     C1. A belt mount for attaching a belt to a wafer of an ostomy appliance, the belt mount comprising a mounting ring which can be attached to a hook by inserting a portion of the mounting ring into a mouth of the hook and pulling the mounting ring and hook away from each other;
         the mounting ring at least partially surrounding a mounting aperture which accommodates at least a portion of the hook upon successful insertion of the portion of the mounting ring into the mouth of the hook;   wherein the mounting ring bordering the mounting aperture comprises at least one chamfered edge.       

     C2. The belt mount of clause C1, wherein the chamfered edge is on a first face of the mounting ring. 
     C3. The belt mount of clause C1 or clause C2, wherein the chamfered edge comprises a U-shaped chamfered edge. 
     C4. The belt mount of any one of clauses C1 to C3, further comprising at least one protrusion that extends from at least one of a first face and a second face of the mounting ring to contact the hook when inserting the portion of the mounting ring into the mouth of the hook. 
     C5. The belt mount of clause C4, wherein the at least one protrusion is located adjacent to the chamfered edge of the mounting ring. 
     C6. The belt mount of clause C4 or clause C5, wherein the at least one protrusion comprises a ramped surface facing towards the mounting aperture. 
     C7. The belt mount of clause C6, wherein the ramped surface is formed as a smooth continuation of the chamfered edge. 
     C8. A system comprising a belt mount as set out in any one of clauses C1 to C7 and a hook, wherein the hook comprises a baseplate and a cantilevered hook element, wherein a mouth of the hook is defined between the baseplate and the cantilevered hook element. 
     C9. The system of clause C8, wherein a clearance of the mouth between the baseplate and the cantilevered hook element is greater in dimension than a thickness of the chamfered edge of the mounting ring. 
     D1. The belt mount of any one or clauses A1 to A11 or B1 to B12 or C1 to C7, wherein the mounting aperture is elongated in a radial direction. 
     D2. The belt mount of any one or clauses A1 to A11 or B1 to B12 or C1 to C7 or D1, wherein the belt mount is configured to reversibly attach the belt to the wafer. 
     D3. The belt mount of any one or clauses A1 to A11 or B1 to B12 or C1 to C7 or D1 to D2, wherein the belt mount is formed from a flexible material. 
     D4. The belt mount of any one or clauses A1 to A11 or B1 to B12 or C1 to C7 or D1 to D3, wherein the mounting ring is configured to be flexed during detachment of the portion of the mounting ring from the hook. 
     D5. The belt mount of any one or clauses A1 to A11 or B1 to B12 or C1 to C7 or D1 to D4, wherein the belt mount is formed from a resilient material. 
     D6. The belt mount of any one or clauses A1 to A11 or B1 to B12 or C1 to C7 or D1 to D5, wherein the mounting ring is configured to be more flexible than the hook. 
     D7. The belt mount of any one or clauses A1 to A11 or B1 to B12 or C1 to C7 or D1 to D6, wherein the mounting ring is D-shaped. 
     D8. The belt mount of any one or clauses A1 to A11 or B1 to B12 or C1 to C7 or D1 to D7, wherein the belt mount comprises two or more mounting rings. 
     D9. The belt mount of any one or clauses A1 to A11 or B1 to B12 or C1 to C7 or D1 to D8, wherein the belt mount comprises two opposed mounting rings. 
     D10. The belt mount of any one or clauses A1 to A11 or B1 to B12 or C1 to C7 or D1 to D9, wherein the belt mount is part of the wafer and the hook is associated with the belt. 
     D11. A wafer comprising the belt mount of clause D10. 
     D12. The belt mount of any one or clauses A1 to A11 or B1 to B12 or C1 to C7 or D1 to D9, wherein the belt mount is associated with the belt and the hook is part of the wafer. 
     D13. The system of any one of clauses A12 to A17 or B13 to B15 or C8 to C9, wherein the baseplate further comprises an aperture. 
     D14. The system of clause D13, wherein the aperture is in register with the cantilevered hook element. 
     D15. The system of any one of clauses A12 to A17 or B13 to B15 or C8 to C9 or D13 to D14, wherein an underside of the cantilevered hook element comprises a recess. 
     It is to be understood that at least some of the figures and descriptions of the disclosure have been simplified to focus on elements that are relevant for a clear understanding of the disclosure, while eliminating, for purposes of clarity, other elements that the reader skilled in the art will appreciate may also be required. Because such elements are well known to the reader skilled in the art, and because they do not necessarily facilitate a better understanding of the disclosure, a description of such elements is not provided herein.