Tool for squeezing out high-viscosity liquid from tube container

Abstract: A tool (10) for squeezing out a high-viscosity liquid from a flexible plastic tube container includes a spool (12) having a slot (20) in which the bottom of the tube container is received and locked, and a container holder (14) having a pair of opposed bearing portions (24) frictionally and rotatably supporting thereon a body (16) of the spool (12), and a pair of opposed engagement portions (22a, 22b) engageable with a body of the tube container as the tube container is wound on the spool body from the bottom thereof. When a rotational force or torque on the spool (12) is released, the spool (12) is urged to rotate in the reverse direction by a resilient force stored in a portion of the flexible plastic tube container wound on the spool body (16). However, partly due to a friction acting between the spool body (16) and the bearing portions (24), and partly due to the engagement between one (22b) of the engagement portions (22a, 22b) and the tube container, the spool (12) is held immovable relative to the container holder (14) against the resilient force of the tube container.

Description: The present invention relates to a device for squeezing out a high-viscosity liquid, such as a sealant, an adhesive, a grease or a tooth paste, from a spout of a plastic tube container. More specifically the present invention relates to a device for squeezing out a high-viscosity liquid from a plastic tube container comprising a container holder being provided with an elongated through opening and a pair of coaxial bearings oppositely disposed on lateral bearing portions of the container holder, and a spool extending substantially in parallel to the through opening and being rotatably supported by the bearings for winding up the tube and pulling it through the elongated through opening, said spool being provided with a slot for receiving the broad end of the tube container, the spool comprises two end portions, both being provided with a bearing surface, respectively, extending about the longitudinal axis of the spool on the outer circumference of the spool, while each of the bearing surfaces of said end portions contacts one of the bearing surfaces provided at the inner circumference of the coaxial bearings disposed on the lateral bearing portions of the container holder. Such a device is known from US-A-2 748 981 especially adapted for dispensing paste-like cosmetic products. Conventionally, the high-viscosity liquid, for example sealant for bath rooms or sash windows is filled into a tube container made of metal such as aluminum or lead. Subsequently a squeezing nozzle is fitted to a spout of the tube container. However, partly because the nozzle of the tube container is tapered and has a small discharge hole, and partly because of the high-viscosity of the liquid as stated above, a large pressure or force must be exerted on the tube container in order to squeeze out the high-viscosity liquid from the tube container. In addition, the liquid must be squeezed out entirely from the tube container to avoid wastage. Taking these demands into account, it has been a known practice, for example in US-A-2 748 981 or US-A-4 359 173, to use a squeezing device for facilitating squeezing the liquid out of the tube container. The known squeezing devices include a spool having a slot in which a bottom of the tube container is received and locked, and a grip portion or handle integrally formed with the spool for rotating the spool. The squeezing device as attached to the tube container winds up the tube container on the spool from the bottom of the tube container during which time the tube container is compressed and hence the high-viscosity liquid is squeezed out from the tube container through the nozzle. In recent years, from the point of view of aesthetical appearance and utility, the metallic tube containers have been replaced by flexible plastic tube containers such as laminated tubes or polyethylene tubes. Conventionally the make-up of themetal tubing material is such that the tube container does not unwind, once wound. Since metal tube containers have only little elasticity compared with polymer tube containers a small amount of friction caused in the bearings of the spool, that to some extent always occurs when surfaces contact each other, is sufficient for metal tube containers but does not prevent unwinding of elastic polymer tube containers. In the case where the known squeezing device is used with the flexible plastic tube containers, the grip portion of the squeezing tool is manipulated to rotate the spool in one direction for winding up the flexible plastic tube container from the bottom thereof, so that liquid is squeezed out from the flexible plastic tube container. However, when the grip portion is released, the spool and the grip portion (i.e., the tool itself) is forced to rotate in the opposite direction due to the high elasticity of the flexible plastic tube container. The flexible plastic tube container is unwound from the spool, accordingly. With the foregoing drawbacks of the prior art in view, the objective of this invention is to provide a device for squeezing out a high-viscosity liquid from a flexible plastic tube container which retains a tube container lacking shape retention properties in a deformed position, for example in a wound up state preventing recoil of the tube once wound. According to this invention, there is provided a device for squeezing out a high-viscosity liquid from a plastic tube container as defined at the beginning wherein the inner diameter of the coaxial bearings is smaller than the outer diameter of the spool and each bearing portion is provided with a plurality of slits extending radially from the respective coaxial bearing said bearing surfaces of the coaxial bearing causing together with the opposed surface of the spool a frictional resistance which prevents an unwinding torque owing to the elasticity of the tube container to unwind the plastic tube container. In use, the container holder is fitted over the flexible plastic tube container from the bottom thereof and the bottom of the tube container is received and locked in the slot of the spool. Then, while holding the tube container with one hand, the user rotate the spool in one direction to wind up the tube container. With this winding, the high-viscosity liquid is squeezed out from a spout of the tube container. During that time, the container holder tends to rotate together with the spool due to the friction acting between the spool and the bearing portions of the container holder. However, rotation of the container holder is prevented by one of the engagement portions which is held in abutment with the tube container. Thus, the tube container can be wound on the spool stably and reliably. When the user releases the spool, the spool is urged to rotate in the reverse direction by a resilient force stored in a portion of the tube container wound on the spool body. In this instance, however, partly due to a friction acting between the spool body and the bearing portions of the container holder, and partly due to the abutting engagement between the other of the engagement portions and the tube container, the spool is held immovable relative to the container holder and also to the tube container. Thus, the tube container is firmly held in position against unwinding. The bearing portions have a pair of aligned bearing holes having a diameter slightly smaller than the outside diameter of the spool, and a plurality of slits extending radially outwardly from each of the bearing holes. The spool received in the bearing holes is rotatable against a friction acting between the spool body and the bearing portions. According to a preferred embodiment of the invention the squeezing tool may include further friction means disposed on at least one of the spool and the bearing portions for producing friction acting between the spool and the bearing portions to prevent the spool from rotating in the opposite direction relative to the bearing portions. According to a further embodiment the friction means comprises a roughened outer surface of a portion of the spool supported by each of the bearing portions or according to another embodiment a row of teeth formed on an outer peripheral surface of the spool at a portion supported by each of the bearing portions. The roughened surface and the teeth on the spool may be used solely or in combination with a row of teeth formed on a peripheral wall of the bearing hole. In another preferred embodiment of the invention the container holder includes a rectangular hollow holder body having an elongate strip which is separable from the remainder of the holder body and can be locked with the remainder of the holder body. The container holder thus constructed can be developed or spread into a substantially flat configuration. The spreadable container holder can easily be manufactured by molding and is easy to transport. It is preferable that the container holder is formed of a resiliently deformable material. The resiliently deformable container holder is able to entirely squeeze out the high-viscosity liquid from the tube container. The above and other features and advantages of the present invention will become more apparent from the following description when making reference to the detailed description and the accompanying sheets of drawing in which preferred structural embodiments incorporating the principles of the present invention are shown by way of illustrative examples. FIG. 1 is a perspective view of a tool for squeezing out a high-viscosity liquid from a flexible plastic tube container according to an embodiment of the present invention; FIG. 2 is a front elevational view of the squeezing tool; FIG. 3 is a cross-sectional view taken along line III - III of FIG. 1; FIG. 4 is a fragmentary perspective view of the body of a spool having a friction means; FIG. 5 is a fragmentary perspective view showing a modified form of the friction means which is provided on the body of a spool; FIG. 6 is a cross-sectional view of the squeezing tool shown in FIG. 1 as it is used with a flexible plastic tube container for squeezing out a high-viscosity liquid from the tube container; and FIG. 7 is a perspective view of a high-viscosity liquid squeezing tool according to another embodiment of this invention. The invention will be described below in greater detail with reference certain preferred embodiments illustrated in the accompanying drawings. FIGS. 1 through 3 show a squeezing tool 10 according to a first embodiment of this invention. The squeezing tool 10 generally comprises a spool 12 on which a flexible plastic tube container T containing a high-viscosity liquid such as a sealant is wound from the bottom thereof, and a container holder 14 for holding the tube container T against rotation relative to the reel 12. The flexible plastic tube container T suitable for use with the sealant includes a laminated tube having a moisture-proof film such as an aluminum foil, and a polyethylene tube. The spool 12 includes a tubular spool body 16 and a grip portion 18 in the form of a wing handle formed integrally with an end of the spool body 16 for rotating the spool body 16. The spool body 16 has a longitudinal slot 20 for receiving and locking therein a bottom end of the tube container T. The container holder 14 includes a rectangular hollow holder body 22 for holding therein a body of the tube container T, and a pair of opposed bearing portions 24, 24 projecting rearward from opposite sides of the holder body 22 for rotatably supporting thereon the spool body 16. The holder body 22 has upper and lower engagement strips 22a and 22b and a pair of opposed side plates (not designated) interconnecting the engagement strips 22a, 22b at opposite ends. The engagement strips 22a, 22b are engageable with the body of the flexible plastic tube container T when the tube container T is wound on the spool body 16 for a purpose described below. The bearing portions 24 have a pair of aligned bearing holes 26, respectively, through which the spool body 16 extends. The container holder 14 is made from a synthetic resin and resiliently deformable as a hole. Preferably, the upper engagement strip 22a or the lower engagement strip 22b is separable from one of the side plates of the holder body 22 and can be locked, by snap-fitting for example, with the same side plate so that the container holder 14 can be developed or spread into a substantially flat single sheet. The spreadable container holder can readily be manufactured by molding and is handy to transport. The bearing holes 26 of the respective bearing portions 24 have a diameter slightly smaller than the outside diameter of the spool body 16. Each of the bearing portions 24 has a plurality of slits 28 extending radially outwardly from the corresponding bearing hole 26. The spool body 16 is press-fitted into the bearing holes 26 so that the spool body 16 is rotatable against a friction acting between the spool body 16 and the peripheral walls of the bearing holes 26. The spool body 16 may have two or more longitudinal slots 20 in which instance the spool body 16 is radially inwardly deformable when it is press-fitted into the bearing holes 26 of the container holder 14. In addition, the spool body 16 is rotatable against a friction acting between the spool body 16 and the peripheral walls of the bearing holes 26. The slits 28 in the bearing portions 24 may be omitted. In the case of the spool body 16 having a single longitudinal slot 20, it is preferable that the spool body 16 is made from a resilient material and capable of resiliently contract and expand in the radial direction. In the embodiment described above, the bearing holes 26 have a circular shape. This is not restrictive but illustrative. The bearing holes 26 may have any other shape including a polygon on condition that a friction is produced between the spool body 16 of the spool 12 and the peripheral walls of the bearing holes 26 when the spool body 16 is caused to rotate and also while the spool body 16 is rotating. The squeezing tool 10 may further have a friction means or element for exerting friction on the spool body 16 when the spool body 16 is caused to rotate. The friction means may be provided on either one or both of the peripheral walls of the bearing holes 26 and the spool body 16. As shown in FIG. 4, the friction means may comprises a roughened outer surface 16a formed by satin-like finish on a portion of the spool body 16 which is received in each of the bearing holes 26. Alternatively, the friction means may include, as shown in FIG. 5, a row of teeth 16b formed on the outer surface of the spool body 16 at a portion received in each bearing hole 26 and/or a row of teeth 26a formed on the peripheral wall of each bearing hole 26. The friction means 16a, 16b, 26a thus provided produces a friction which acts between the spool body 16 and the bearing portions 24 and is large enough to prevent reverse rotation of the spool body 16 which would otherwise occur when the spool body 16 is subjected to a resilient force stored in a portion of the flexible plastic tube container wound on the spool body 16. The roughened surface 16a shown in FIG. 4 may be provided on the peripheral wall of each bearing hole 26 in which instance the roughened surface 16a may further be used in combination with the teeth 16b on the spool body 16 shown in FIG. 5. The teeth 26a on the peripheral wall of each bearing hole 26 may be used in combination with the roughened surface 16a on the spool body 16. The squeezing tool 10 of the foregoing construction is used and operates in a manner described follows. The container holder body 22 of the squeezing tool 10 is fitted over a bottom end portion of the tube container T, and then the bottom end of the tube container T is received and locked in the slot 20 in the spool 12. While holding the tube container T with its one hand, the user rotates the wing handle 18 in one direction to progressively wind up the tube container T on the spool body 16 from the bottom end of the tube container T. With this winding, a high-viscosity liquid C is squeezed out from the tube container T through a nozzle N screwed to a spout of the tube container T, as shown in FIG. 6. During that time, the container holder 14 tends to rotate in the same direction (winding direction) as the spool body 16, however, rotation of the container holder never occurs because the container holder is kept immovable due to the abutting engagement between the engagement strip 22a with the tube container T. When the wing handle 18 is released, the spool 12 is urged to rotate in the opposite direction by a resilient force stored in a portion of the tube container T wound on the spool body 16. However, partly due to a friction acting between the spool body 16 and the bearing portions 24, and partly due to the abutting engagement between the engagement strip 22b and the tube container T, the spool body 16 is kept immovable against rotation relative to the container holder 14. The reverse rotation of the spool body 16 can be avoided more positively when the squeezing tool is provided with at least one of the friction means 16a, 16b and 26a shown in FIGS. 4 and 5. Instead of holding the tube container T, the container holder 14 may be held by the user while the tube container is wound on the spool 12 of the squeezing tool 10. FIG. 7 shows a squeezing tool according to another embodiment of this invention. This squeezing tool differs in the structure of a container holder 14 from the squeezing tool of the foregoing embodiment shown in FIG. 1. The container holder 14 has a rectangular hollow body 22 composed of a pair of opposed side plates 24. 24, and upper and lower elongate plates 32, 32 interconnected by the side plates 24, 24. The side plates 24 constitute bearing portions frictionally and rotatably supporting thereon the spool body 16. The container holder 14 further includes a pair of engagement wings 32a, 32b integral with and projecting from front edges of the upper and lower plates 32, 32, respectively. When the squeezing tool is in use, the engagement wings 32a, 32b are engageable with a body of the tube container T to prevent the tube container T from rotating about a longitudinal axis of the spool body 16. The squeezing tool shown in FIG.7 operates in the same manner as the squeezing tool 10 of the foregoing embodiment shown in FIGS. 1 - 3 and 6 and, therefore, a further description thereof can be omitted. As described above, the squeezing tool of this invention includes a spool frictionally and rotatably supported by a container holder, and a pair of opposed engagement portions formed on the container holder for engagement with a flexible plastic tube container. The spool is manually rotated in one direction against a friction acting between a spool body and bearing portions of the container holder, so as to wind up the tube container on the spool body from the bottom thereof. With this winding, a high-viscosity liquid is squeezed out from the tube container. When a manual rotational force or torque on the spool is released, a resilient force stored in a portion of the flexible plastic tube container urges the spool to turn in the opposite direction. However, partly due to the friction acting between the spool body and the bearing portions, and partly due to the engagement between one of the engagement portions and the tube container, the spool is held immovable relative to the container holder and, hence, unwinding of the tube container does never occur.

Claims: A device for squeezing out a high-viscosity liquid (C) from a plastic tube container (T) comprising a container holder (14) being provided with an elongated through opening and a pair of coaxial bearings oppositely disposed on lateral bearing portions (24) of the container holder (14), and a spool (16) extending substantially in parallel to the through opening and being rotatably supported by the bearings for winding up the tube and pulling it through the elongated through opening, said spool (16) being provided with a slot for receiving the broad end of the tube container (T), the spool (16) comprises two end portions, both being provided with a bearing surface, respectively, extending about the longitudinal axis of the spool (16) on the outer circumference of the spool (16), while each of the bearing surfaces of said end portions contacts one of the bearing surfaces provided at the inner circumference of the coaxial bearings (26) disposed on the lateral bearing portions (24) of the container holder (14), characterised in that the inner diameter of the coaxial bearings (26) is smaller than the outer diameter of the spool (16) and each bearing portion (24) is provided with a plurality of slits (28) extending radially from the respective coaxial bearing (26) said bearing surfaces of the coaxial bearing (26) causing together with the opposed surface of the spool (16) a frictional resistance which prevents an unwinding torque owing to the elasticity of the tube container (T) to unwind the plastic tube container (T). Device according to claim 1, characterised in that the container holder (14) is made of resiliently deformable material. Device according to one of claims 1 or 2, characterised in that the container holder (14) comprises a rectangular holder body (22) consisting of a pair of elongated strips (22a, 22b) facing each other and a pair of side plates facing each other and interconnecting said elongated strips (22a, 22b) at opposite ends. Device according to claim 3, characterised in that said side plates are integral with said bearing portions (24). Device according to one of claims 3 or 4, characterised in that said bearing portions (24) project contiguously from said side plates of the holder body (22). Device according to one of claims 1 to 5, characterised in that the elongated strips (32, 32) are provided with a pair of engagement wings (32a, 32b) facing each other, projecting from the edge of said elongated strips (32, 32) respectively. Device according to one of claims 3 to 6, characterised in that one of said elongated strips (22a, 22b; 32, 32) is detachably secured to one of said side plates. Device according to one of claims 1 to 7, characterised in that the spool (12) comprises a tubular body (16) resiliently contractible in radial direction. Device according to one of claims 1 to 8, characterised in that the spool (12) has an integral handle (18) at one end thereof. Device according to one of claims 1 to 9, characterised in that at least one of the contacting surfaces of the spool (12) and the coaxial bearings (26) of the container holder (14) is provided with a surface formation acting as friction means (16a, 16b, 26a, 26b). Device according to claim 10, characterised in that the bearing surface of the end portion of the spool (12) contacting the bearing surface of the coaxial bearing (26) is provided with a rough surface formation (26a). Device according to claim 10, characterised in that the bearing surface of the end portion of the spool (12) contacting the bearing surface of the coaxial bearing (26) is provided with a row of teeth (16b). Device according to one of claims 10 to 12, characterised in that the bearing surface of each coaxial bearing (26) comprises a row of teeth (26a) formed on a peripheral wall of each of said bearing holes (26).

Inventors: HINO TAKAO GREEN HEIM IZUMINO, NIMURA AKIO, OKAMURA NAOMI, HINO, TAKAO, GREEN HEIM IZUMINO, NIMURA, AKIO, OKAMURA, NAOMI
Applicants: CEMEDINE CO LTD, CEMEDINE CO., LTD.
Application year: 1992
Main classification: B65D35
IPC codes: B65D35