# Patent

## Title
Medical seal dispenser with exit hump

## Abstract

A medical seal dispenser having a container molded of plastic and having clamshell portions hinged together. The clamshell portions of the container can be locked together when in a closed position. One clamshell portion includes a core holder for holding a roll of foil-type medical seals removably attached to a carrier strip. During dispensing of a medical seal, the carrier strip is pulled so that it is unrolled from the roll and is routed over an exit hump of the dispenser. The exit hump imparts a curl to the metal foil seal that is opposite that which was incurred when rolled on the roll, thereby straightening the foil seal.

## Background
RELATED APPLICATION
This non-provisional patent application is a continuation of U.S. patent application Ser. No. 12/157,861 filed Jun. 13, 2008, now U.S. Pat. No. 8,002,113, which claims the benefit of provisional patent application filed Jun. 21, 2007, Ser. No. 60/936,629, entitled “Medical Seal Product Dispenser.”


TECHNICAL FIELD OF THE INVENTION
The present invention relates in general to packaging methods and apparatus, and more particularly to the fabrication of a medical seal dispenser.
BACKGROUND OF THE INVENTION
Medical seals are used to cap the port of an IV bag or other medical container after the contents of the container have been modified by a pharmacist or other technician. IV containers generally contain conventional liquid solutions, such as dextrose, sodium chloride, etc., to which the pharmacist adds a drug or solution as prescribed by the physician. The pharmacist first selects an IV bag having the appropriate solution therein, and removes the original seal that seals the injection port. This procedure is carried out in a sterile environment so as not to contaminate either the contents of the IV bag, the membrane of the port or the sterile surface of the medical seal. The drug is generally added by filling a syringe with the drug, inserting the syringe needle into the sterile, self-sealing rubber membrane covering the injection port, and injecting the drug into the solution in the IV bag. A medical seal is then removed from a carrier strip pulled from a dispenser box, and the sterile side of the seal is applied over the injection membrane. Medical seals are generally constructed with tear slits so that when removed from the port of a medical container, telltale pieces of the seal remain on the port to provide a nurse or other attendant an indication that the IV bag may have been tampered with, such as by an unauthorized or inadvertent injection of a fluid into the bag.
Medical seals are manufactured with many features to facilitate the identification of the drug injected into the IV bag, to detect tampering of the seal, and to assist the attendant in the application and removal thereof from the injection port of the medical container. Various medical seals are disclosed in U.S. Pat. Nos. 4,266,687 by Cummings; 4,390,104 by Cummings; 4,423,819 by Cummings; 4,514,248 by Cummings; 4,527,703 by Cummings and 4,598,834 by Singletary.
A medical seal is generally constructed using a foil/plastic laminate seal member that is adhesively attached to a release liner formed on one side of a long carrier strip. Each seal includes an adhesive surface surrounding a sterile adhesive-free area. The sterile adhesive-free area is placed into contact with the injection membrane of the IV container, and the surrounding adhesive is adapted for attaching the seal around the port. Many individual seals are attached to a carrier liner so as to be dispensed one at a time. The strip of medical seals is wound around an annular core, usually 1,000 seals per roll. The roll of seals undergoes a process in which the seals are sterilized, including the adhesive surface and the adhesive-free area. Once the adhesive-free area is sterilized, it remains sterilized until removed from the carrier liner prior to being placed on the injection membrane of the IV container. Thus, the sterility of the procedure is not compromised, which would otherwise allow bacteria and other particles to contaminate the injection membrane or the contents of the IV bag.
The dispensing of the individual seals is carried out in such a manner so as to maintain the original sterility thereof. If a seal is dispensed from the roll and not used immediately thereafter to seal the injection port of a medical container, then it must be discarded. In the event that a portion of a seal is inadvertently lifted from the carrier strip and not immediately used, then it must also be discarded. The partial lifting of a seal from the carrier strip may prematurely occur when the carrier strip is pulled around the outlet corner of the dispenser box in which the roll of seals is stored, or the roll is inadvertently spun inside the box when the carrier strip is pulled too fast, in which event a length of the carrier strip will unwind inside the dispenser box. The unwinding of the carrier strip inside the dispenser box can allow portions of the seals to be prematurely lifted from the carrier strip.
The core on which the roll of seals is wound is made from various materials, primarily paper or plastic. Although the core is specified to be a certain diameter, such as three inches in diameter, the actual diameter of the core often varies plus or minus several thousandths of an inch, with paper cores having the widest variance. The variance in the core diameter causes some rolls to be tight when placed on a core holder located in the dispenser box. The tight fit between the core of the carrier strip roll and the core holder makes it difficult to pull the strip out of the dispenser box and dispense the seals from the strip. When the core of the roll of seals is slightly oversized and fits loosely on the core holder of the dispenser, the roll of seals will spool or rotate freely on the core holder, thus tending to tangle the strip of seals inside the dispenser box.
Conventional seal dispensers include a plastic insert that holds a roll of seals inside a paper/chipboard folding carton or box. The roll of seals is placed onto the core holder and the end of the carrier strip is routed over the exit hump formed on the plastic insert, and then routed through a small slit in the edge of the dispenser box. The plastic insert, with the roll of seals thereon, is inserted into the dispenser box. The lid of the box is then taped shut. The exit hump formed on the plastic insert is intended to provide a gentle curved path over which the carrier strip is pulled. This exit structure is intended to eliminate the sharp exit corner which would otherwise allow the seals to prematurely lift off of the carrier strip when the strip is pulled out of the box around the sharp corner of the box itself.
If the roll of seals inside the dispenser box spins or spools excessively when dispensing, loops in the carrier strip are created inside the dispenser box and the inadvertent lifting of the seal from the carrier strip can occur. When a technician pulls down too quickly on the carrier strip during dispensing of seals from the box, or with too great a force, the roll of seals can continue to spin on the core holder of the dispenser. As noted above, when the roll of seals spools or spins inside the dispense box, an excess length of the carrier strip is unrolled inside the dispenser box. This can cause folding or bending of the carrier strip inside the dispenser box to a degree that one or more of the seals can prematurely lift off of the release liner of the carrier strip, thus allowing the sterile target area of the seal to be exposed.
Problems and limitations with the standard dispenser box include the following. First, the plastic insert tends to slide and move around in the dispenser box during dispensing, and moves away from the sharp corner of the box near the small exit slit. This movement permits the position of the exit hump on the insert to move away from the slit in the box and allow the carrier strip to be pulled at such a sharp angle that allows the seals to prematurely lift off the carrier strip and expose the sterile area on the seals to contaminants. Secondly, the dispenser box needs to be positioned by the user so that the carrier strip pulled from the box exits from the bottom of the box to prevent premature lifting of the seals off the carrier strip. Thirdly, the plastic insert and core holder formed thereon are often slightly too large in diameter for some rolls, and too small for other rolls. Thus, a smooth rolling motion of the core on the plastic insert, with a small amount of drag, is not obtained, whereupon the carrier strip must be pulled with an excessive force, or the roll of seals spins too freely. Fourth, the entire dispenser requires assembly of the folding carton and insertion of plastic insert and roll of seals therein.
From the foregoing, it can be seen that a need exists for a medical seal dispenser that overcomes the foregoing, and other problems and shortcomings. A need exists for a medical seal dispenser where the plastic insert and the container box are integrated together to make the product more cost effective, and to prevent relative movement between such components. Another need exists for a medical seal dispenser that is constructed as a unitary item, and opens like a clamshell to allow easy insertion of the roll of seals therein, and then snap locks together. Another need exists for a medical dispenser that includes a core holder adapted for manually adjusting the amount of drag on the core, as a function of the particular inside diameter of the core. Another need exists for a medical seal dispenser that is easily constructed and reliable in operation.
SUMMARY OF THE INVENTION
In accordance with the principles and concepts of the invention, disclosed is a medical seal dispenser in which the core holder and the dispenser container are made integral and of a unitary construction.
In accordance with a feature of the invention, disclosed is a dispenser formed as a clamshell from thermoformed plastic, where the dispenser prevents jamming, spooling and accidental or premature lifting of the sterile seal from the carrier strip.
The medical seal dispenser constructed according to the invention allows free, but controlled movement of the carrier strip from the roll, one at a time at the discretion of the user. This prevents spooling of the roll of seals inside the dispenser and possible tangling of the strip and premature release of one or more seals from the carrier strip.
According to another feature of the invention, the seal dispenser incorporates “speed bumps” on the core holder to create sufficient friction to prevent excessive spin or back spinning and/or looping of the carrier strip. One or more speed bumps can be utilized, depending upon the width and weight of the roll of seals, and the inside diameter of the roll being dispensed. The speed bumps are formed so as to allow them to be manually popped inward when too much friction exists. This feature allows the technician to fine tune the amount of drag desired for each roll of seals.
The seal dispenser of the invention incorporates an exit hump over which the carrier strip and attached seals are pulled at an angle less than that necessary to allow the seals to prematurely lift or become detached from the carrier strip. The packaging of the roll of seals does not require any box with a slit therein, so the carrier strip cannot be pulled around any sharp corner.
The seal dispenser according to one embodiment of the invention includes a clamshell design having two halves that fold together and capture the roll of seals therein. Prior to folding the clamshell halves together, the roll of seals is inserted on the core holder which is formed on one half of the clamshell, and the carrier strip is threaded to the exit area over the exit hump. The clamshell halves are folded together and snap locked to hold the two clamshell halves together. The exit hump is split into two halves, one half formed with each half of the clamshell. When the clamshell halves are folded together, the end of the core holder on one clamshell portion is nested into a corresponding annular receiver of the other clamshell portion to lock the clamshell portions together.
The advantages of the seal dispenser of the invention include one or more of the following. The clamshell dispenser replaces standard paper/cardboard dispenser boxes and offers several additional advantages, including reduction of paper lint from the dispenser box that can otherwise contaminate a sterile environment in which the seals are dispensed, greater strength, roll control to reduce excessive spinning, and the ability to position the seal dispenser in alternative positions for dispensing. The overall cost of the dispenser is reduced, the plastic dispenser can be wiped with a cleaning agent prior to placement in sterile filling area, the speed bumps allow tight rolls to compress bumps for easier dispensing of small diameter cores, the speed bumps can be reduced in number to allow technician to adjust carrier liner tension to a preferred amount, the exit hump does not move inside dispenser, thus maintaining the proper exit position, and the overall assembly of the product can be carried out much more quickly.
According to one embodiment of the invention, disclosed is a dispenser for dispensing seals removably attached to a carrier strip wound on a core. The dispenser includes a roll of seals wound around the core, where each seal includes a foil layer that assumes a first arc shape when wrapped around the core. The dispenser has a core holder on which the roll of seals is placed so that the roll of seals and the core can be rotated for dispensing the seals. An exit opening is formed in the dispenser through which the carrier strip and seals protrude so that the carrier strip is available for pulling by a user of the dispenser. The dispenser further includes a curved exit hump over which the carrier strip is routed when pulled by the user to dispense one or more seals. The exit hump is positioned to form a second arc shape in the foil layer of the seal, in a direction opposite the first arc shape.
According to another embodiment of the invention, disclosed is a dispenser for dispensing seals removably attached to a carrier strip wound on a core, which includes a clamshell formed from a sheet of plastic. The clamshell has four linear sides and four corners, and a first cover and a second cover that are hinged together and movable between an open position and a closed position. Provided are snap locking male and female members for keeping the first and second covers of the clamshell in the closed position. A roll of the seals is wound around the core, and each seal includes a metal foil layer that assumes a first arc shape when wrapped around the core. The dispenser has a core holder on which the roll of seals is placed so that the roll of seals and the core can be rotated for dispensing said seals. An exit opening is formed in one corner of the dispenser through which the carrier strip and seals protrude so that the carrier strip is available for pulling by a user of the dispense. The dispenser further includes a curved exit hump over which the carrier strip is routed when pulled by the user to dispense one or more seals. The exit hump is positioned to form a second arc shape in the foil layer of the seal, in a direction opposite the first arc shape.
According to a further embodiment of the invention, disclosed is a dispenser for dispensing seals removably attached to a carrier strip wound on a core, which includes a clamshell formed from a sheet of plastic, where the clamshell has four linear sides and four corners. The clamshell has a first cover and a second cover that are hinged together and movable between an open position and a closed position. Further included are four separate snap locking male and female members, each located at a respective corner of the clamshell for snap locking the first and second covers in the closed position. A roll of the seals is wound around the core, and each seal includes a metal foil layer that assumes a first arc shape when wrapped around the core. The dispenser has a core holder on which the roll of seals is placed so that the roll of seals and the core can be rotated for dispensing said seals. An exit opening is formed in one corner of the dispenser through which the carrier strip and seals protrude so that the carrier strip is available for pulling by a user of the dispenser. A curved exit hump is provided over which the carrier strip is routed when pulled by the user to dispense one or more seals. The exit hump is positioned to form a second arc shape in the foil layer of the seal, in a direction opposite the first arc shape. The exit hump is constructed in two portions, one exit hump portion formed integral with the first cover, and another exit hump portion formed integral with the second cover. With this construction, when the first and second cover portions are hinged to the closed position, the exit hump portions are adjacent each other, and one snap lock male and female member is partially encircled by a curvature of the exit hump portions to snap lock together the exit hump portions.



BRIEF DESCRIPTION OF THE DRAWINGS
Further features and advantages will become apparent from the following and more particular description of the preferred and other embodiments of the invention, as illustrated in the accompanying drawings in which like reference characters generally refer to the same parts, functions or elements throughout the views, and in which:
FIG. 1 is a side view of the clamshell dispenser constructed according to a preferred embodiment of the invention;
FIG. 2 is a bottom view of the clamshell dispenser of FIG. 1;
FIG. 3a is a top view of the clamshell dispenser of FIG. 1;
FIG. 3b is a partial cross-sectional view of the clamshell dispenser taken along line 3b-3b of FIG. 3a; 
FIG. 4 is an isometric view of the clamshell dispenser in an opened position;
FIG. 5 is a side view of the opened clamshell dispenser;
FIG. 6 is a bottom edge view of the opened dispenser of FIG. 5;
FIG. 7 illustrates another embodiment of the invention, in which the conventional plastic holder insertable into a package box is equipped with speed bumps;
FIG. 8 is a frontal side view of the plastic holder insert of FIG. 7; and
FIG. 9 is an enlarged cross-sectional view of a portion of the hub, showing the speed bumps engaging with the inner surface of the core on which the carrier strip is wound.



DETAILED DESCRIPTION OF THE INVENTION
Referring now to FIG. 1 of the drawings, there is shown a side view of the seal dispenser 10 constructed according to a preferred embodiment of the invention. The dispenser 10 is fabricated by thermoforming techniques using a clear PVC type of plastic material. According to this technique, a sheet of plastic is placed over the mold and a vacuum is applied to the mold while the plastic is heated to thereby pull the pliable plastic material into the mold and into a shape conforming to that of the mold. The thickness of the plastic sheet material can be 0.25 inch, or other suitable thickness. Other molding techniques and other types and colors of plastics can be employed. As can be seen, the plastic clamshell dispenser needs no separate box as part of the packaging or dispensing of the seals.
FIG. 1 illustrates the side view of one half 12a of the transparent, plastic clamshell dispenser 10. Formed on the clamshell half 12a is a cylindrical core holder 14 for supporting a roll 16 of seals, one seal 18 shown on the carrier strip 22 ready to be dispensed. The seal 18 itself is a foil/plastic laminate that is adhesively attached to the long carrier strip 22, together with other seals. As noted above, the seals 18 are adhered to a release liner 20 formed on one side of the carrier strip 22. The pull tab 26 and the sterilized target area 28 are free of adhesives and thus are not adhered to the release liner portion 20 of the carrier strip 22. A technician can remove the seal 18 from the carrier strip 22 by simply grasping the pull tab 26 and peeling the seal 18 from the release liner 20 side of the carrier strip 22. As noted above, the carrier strip 22 is rolled onto a core 24 formed of plastic or a stiff paper.
According to an important feature of the invention, the plastic core holder 14 is constructed with one or more speed bumps, one shown as numeral 30. In the embodiment shown in FIG. 1, the core holder 14 is formed with two speed bumps. In practice, it has been found that two or three speed bumps 30 formed on the core holder 14 is sufficient to control the friction between the core holder 14 and the core 24 of the roll 16 of seals. However, any other reasonable number of speed bumps 30 can be employed to achieve the purpose stated herein. The speed bump 30 is simply a portion of the core holder 14 bubbled outwardly to form a protrusion or domed area that can be elevated above the surface in the range of about 0.075 inch to about 0.25 inch. The diameter of each speed bump can be in the range of about 0.5 inch to about 1.0 inch. The outermost surface of the speed bump 30 engages the inner cylindrical surface of the core 24 of the roll 16 of seals.
Importantly, in the event that the inside diameter of the core 24 of the roll of seals is smaller than specified, then less friction is required in order to control the spin of the roll 16 when rotated as a result of the pulling the carrier strip 22 out of the dispenser 10 to expose the next seal 18. In order to reduce the friction on the roll 16 as it is rotated, the technician can unsnap the clamshell dispenser 10 to open it and gain access to the roll 16. The roll 16 of seals can be removed from the core holder 14 and one or more of the speed bumps 30 can be manually pressed in by the technician's finger. The bubble bump 30 pressed in will then remain in the depressed condition and will not thereafter engage the inside cylindrical surface of the core 24 of the roll 16 of seals. With fewer speed bumps engaging the inside surface of the core 24, the friction is reduced and the roll 16 of seals is easier to rotate during dispensing. In the event that the technician finds that too many speed bumps have been pressed in and the friction is reduced too much, the reverse operation can be carried out to press a speed bump out to again cause it to engage with the inner surface of the core 24 of the roll 16 of seals. With the foregoing structure, the friction on the roll 16 can be controlled by the technician to prevent spooling of the roll 16, but yet be able to accommodate roll cores 14 with diametric differences.
The carrier strip 22 is routed from the roll 16 (counterclockwise, as shown), and over an exit hump 32 and out of the dispenser 10 by way of a slot, not shown in FIG. 1. The exit hump 32 prevents the carrier strip 22 from undergoing excessive bending which leads to premature separation of the leading edge of the seal 18 from the release liner 20. The carrier strip 22 is shown twisted a quarter turn in FIG. 1 to illustrate the placement of the seal 18 on the release liner 20. In practice, the carrier strip 22 is not twisted by the technician during dispensing of a seal 18. As will be shown and described below, one half of the exit hump 32a is formed on one half 12a of the clamshell dispenser 10, and the other half 32b (FIG. 4) of the exit hump 32 is formed on the other half 12b of the clamshell dispenser 10.
The clamshell halves 12a and 12b are held together with snap lock mechanisms, one shown as numeral 34. The clam shell half 12a shown in FIG. 1 is formed with cylindrical posts 34 that are snapped into square receptacles 36 formed in the other clamshell half 12b. Four such snap lock structures are formed in the clamshell dispenser 10, one at each corner of the dispenser 10. The full insertion of cylindrical post 34 into the corresponding square receptacle 36 maintains the clamshell halves 12a and 12b locked together and the roll 16 of seals captured for rotation on the core holder 14. As will be described below, the core holder 14 on the clamshell half 12a also locks into an annular ring 68 formed on the other clamshell half 12b. This locking arrangement has been found to be satisfactory to maintain the clamshell halves 12a and 12b locked together even if dropped, but allows a technician to pry the clamshell halves 12a and 12b apart to adjust the friction or replace a roll 16 of seals or otherwise rethread the carrier strip 22 from the roll 16 through the slot to allow access for pulling on the same to dispense a seal 18.
The snap lock mechanism of the preferred embodiment comprising the posts 34 and the square receptacles 36 can of course be other shapes to provide the requisite friction therebetween to maintain the clamshell halves 12a and 12b locked together. The locking mechanism can be male and female engaging members of the same general shape that are frictionally locked together. The snap lock mechanism can be complementary square, round, oval, rectangular, or any other suitable shape. In addition, the clamshell halves 12a and 12b can be formed with over-center or catch type of snap lock closure members, without being of the male-female type.
FIG. 2 illustrates the structural features of the clamshell dispenser 10 from the bottom, and FIG. 3a illustrates the features of the clamshell dispenser 10 from the top thereof. FIG. 2 shows the clamshell half 12a locked to the other clamshell half 12b using the posts 34 and the corresponding square receptacles 36. The interface edge 38 is where the edge of one clamshell half 12a abuts the edge of the other clamshell half 12b. The slot 40 is formed by an opening in both clam shell halves 12a and 12b near the bottom corner of the dispenser 10. As described above, the carrier strip 22 is threaded off the roll 16, over the exit hump 22 and through the slot 40.
FIG. 3a illustrates a top view of the clamshell dispenser 10. The halves 12a and 12b of the clamshell dispenser 10 are joined together with a plastic spine 42. As will be described more fully below, the spine 42 is angled inwardly to provide strength thereto. The plastic spine 42 extends the entire width of the clamshell dispenser 10, and along an entire edge thereof.
FIG. 3b is a cross-sectional view of the sides of the clamshell halves 12a and 12b illustrating the interface 38. The clamshell halves 12a and 12b are formed with circumferential offset dogleg structures 44 and 46 that interengage and provide lateral stability and strength to the dispenser 10.
FIGS. 4-6 illustrate the structural features of the clamshell dispenser 10. Shown is the clamshell half 12a and clamshell half 12b connected by the spine 42. The spine 42 is the width of the dispenser 10 and is connected to clamshell half 12a by a first fold line 50, and connected to the other clamshell half 12b by a second fold line 52. As shown in FIG. 6, the spine 42 is formed with an angle for purposes of strength. The top of the spine 42 includes a triangular-shaped part 54 (FIG. 4) which mates with corresponding angled edges of the clamshell halves 12a and 12b, also shown in FIG. 3a. The bottom part of the spine 42 shown in FIG. 4 includes an edge 56 which forms a part of the exit slot 40 through which the carrier strip 22 is threaded. The edge 56 of the spine 42 is spaced from the corresponding edges 58 and 60 of the clamshell halves 12a and 12b to form the exit slot 40. As shown, the slot 40 is located at the curved end of the exit hump 32 so that the carrier strip 22 exits the clamshell dispenser 10 without any sharp edges that could otherwise cause premature detachment of the seal 18 from the carrier strip 22.
The clamshell half 12a is formed generally symmetrical to the clamshell half 12b, except for the cylindrical locking posts 34 on clamshell half 12a and the square receptacles 36 formed in clamshell half 12b. The other exception of the symmetrical construction of the dispenser 10 is the core holder 14. The core holder 14 includes a cylindrical hub 62 on which the core 24 of the roll 16 of seals is inserted. The hub 62 includes plural transverse ribs 64 to provide strength and rigidity to the core holder 14. While the hub 62 of the core holder 14 is formed with a draft, according to normal molding procedures, the ribs 64 function to provide lateral surface areas without a draft angle to accept the cylindrical core 24 of the roll 16 thereon. Also formed on the hub 62 of the core holder 14 are the speed bumps 30, described above.
At the internal end of the hub 62 is a stub 66 that frictionally fits within an annular ring 68 formed in the other clamshell half 12b. The annular ring 68 is formed with reinforcing ribs 70 that engage with the inner cylindrical surface of the core 24 of the roll of seals. When the stub 66 of the core holder 14 is fully engaged with the annular ring 68, the locking of the clamshell halves 12a and 12b together is facilitated.
The opened clamshell dispenser 10 shown in FIG. 4 appears to have solid portions. However, the clamshell dispenser 10 is preferably formed of a sheet of plastic, and thus all surfaces and portions of the clamshell dispenser are only the thickness of a sheet of plastic. This simplifies the fabrication of the dispenser 10 and reduces the cost and weight thereof. Because of the locking mechanisms, and the reinforcement formed into the structure, the dispenser 10 is sturdy and not easily opened unless intentionally pried apart with a person's hands.
Once the roll 16 of medical seals has been inserted in the dispenser 10 and the clamshell halves 12a and 12b snap locked together, the dispenser 10 and roll of seals 16 are processed to sterilize the entire unit. The entire packaged unit 10 can be sterilized by placing a number of dispensers 10 in a conventional enclosed and controlled environment and subjected to a sterilizing gas, such as ethylene oxide. Any other acceptable sterilization process can be carried out to sterilize the seals, especially the adhesive free area 28 that is placed against the rubber membrane of the IV container port. It is understood that even when the adhesive free area 28 of the seal 18 is surrounded by adhesive and adhered to the release liner side 20 of the carrier strip 22, the sterilizing process nevertheless sterilizes the inaccessible adhesive free area 28 of the seal 18.
From the foregoing, disclosed is a medical seal dispenser that accommodates rolls of seals having different inside diameter dimensions, so that the friction thereon can be controlled and provide a smooth rotating motion to the roll when the carrier strip is pulled to dispense a seal. The hub of the dispenser on which the roll of seals is rotated for dispensing a seal, includes deformable protrusions for adjusting the rotating friction imparted to the roll of seals. The dispenser is constructed as a unitary structure to hold the roll of seals on a hub, as well as provide a container for containing the roll of seals. The dispenser is molded as halves, and snap fit together to reliably hold the roll of seals contained therein, but allowed to be opened by the user to either replace the roll of seals, or adjust the rotating friction of the roll of seals.
While the preferred embodiment has been disclosed with reference to an integral container and core holder, other alternatives are available, including the alternative embodiment 80 of FIGS. 7-9. Here, there is illustrated a conventional dispenser box 82 constructed of a heavy paper material. The box 82 includes a major flap 84 and two minor flaps 86. Also included in the rear portion of the box 82 is an exit slot 88 through which the carrier strip 22, shown in phantom, exits the dispenser box 82. The entire roll 16 of medical seals is shown in phantom wound around a core 24, and is illustrated in a position in the box 82 ready to be dispensed.
As a conventional practice, the roll 16 of medical seals is placed on a planar holder 90 that holds the roll 16 of medical seals. The end of the carrier strip is first threaded through the slot 88 in the rear of the box 82, and then the holder 90 and roll 16 placed thereto are inserted into the box 82 as a unit. Once the holder 90 is fully inserted into the box 82, the slack in the carrier strip 22 is taken up, and the end of the carrier strip 22 is temporarily taped to the outside of the box. The flaps 84 and 86 are folded and closed in a conventional manner to close the dispenser box 82 with the holder 90 and roll 16 therein. In this manner, when the technician is ready to dispense a medical seal 18, all that needs to be done is untape the end of the carrier strip 22 and pull on it to expose the first seal. The unadhered pull tab 26 portion of the seal 18 can be lifted and pulled so as to remove the seal 18 from the release liner portion 20 of the carrier strip 22.
A frontal view of the insertable holder 90 is shown in FIG. 8. The front of the holder 90 is the end that enters the dispenser box 82 first. The holder 90 is fabricated by thermal vacuum forming mold techniques using a thin sheet of plastic. The holder 90 includes a planar base 92 to which a core holder or hub 94 and a hump 96 are integrally molded. The core 24 of the roll 16 of seals is placed on the hub 94, and the carrier strip 22 is routed over the hump 96 as shown in FIG. 7. The box 82 keeps the roll 16 of seals on the hub 94. While not shown, the hub 94 includes a number of raised radial ridges with which the inside of the core 24 traditionally engaged with as the roll 16 of seals 18 was unrolled during dispensing of the seals 18. The hump 96 also includes similar ridges 98 formed thereon. The ridges on the hub 94 as well as on the hump 96 function to provide strength and rigidity to the structures.
In accordance with an important feature of the invention, the holder 90 is formed with the hub 95, and with speed bumps 100 on the hub 94. FIG. 9 illustrates the speed bumps 100 in detail. The speed bump 100 is shown bubbled outwardly to engage with the inside surface of the core 24 on which the carrier strip 22 of seals 18 is wound. The other speed bump 102 is shown pressed inwardly to reduce the effectiveness thereof in the event too much friction exists between the hub 94 and the core 24. The speed bumps 100 are otherwise constructed and function in the same manner as described above in connection with the preferred embodiment. Accordingly, even when employing the conventional method of packaging and dispensing medical seals or other articles, the holder 90 can be constructed with a hub having speed bumps 100 to control and otherwise reduce spooling of the roll 16.
While the preferred and other embodiments of the invention have been disclosed with reference to a specific medical seal dispenser, it is to be understood that many changes in detail may be made as a matter of engineering choices without departing from the spirit and scope of the invention, as defined by the appended claims.

## Claims

1. A dispenser for dispensing seals removably attached to a carrier strip wound on a core, said dispenser comprising:
a roll of said seals wound around said core, and each said seal including a foil layer that assumes a first arc shape when wrapped around said core;
said dispenser formed as a clamshell having two hinged cover halves, and said clamshell dispenser having a core holder on which said roll of seals is placed so that said roll of seals and said core can be rotated for dispensing said seals;
said clamshell having at least first and second adjacent corners, and said cover halves are each formed with a respective trough therein that extend from adjacent said first corner more than half way around said roll of seals to a location adjacent said second corner, whereby said core holder is at least partially encircled by the troughs of said cover halves, the trough of one cover half is adjacent the trough of the other cover half when the clamshell is closed;
one said trough terminates in a portion of an exit hump, and the other said trough terminates in another portion of said exit hump so that when said trough portions are adjacent each other said exit hump portions are adjacent each other to provide a full exit hump;
plural male and female snap locking members located in the troughs of said cover halves, whereby when the cover halves are hinged together the male and female snap locking members engage with each other and lock the cover halves of the clamshell dispenser together;
an exit opening in said clamshell dispenser through which said carrier strip and seals protrude so that said carrier strip is available for pulling by a user of the clamshell dispenser; and
said carrier strip is routed over said full exit hump when pulled by the user to dispense one or more seals, said full exit hump positioned to form a second arc shape in the foil layer of the seal, in a direction opposite the first arc shape.

2. The seal dispenser of claim 1, further including a spine that extends between said first and second corners, said spine connects said cover halves together via respective hinges, and said first and second troughs do not extend along a central portion of said spine between said first and second corners.

3. The seal dispenser of claim 1, wherein said full exit hump is positioned adjacent the exit opening in said clamshell dispenser.

4. The seal dispenser of claim 1, wherein said full exit hump is positioned so that during dispensing of said seals, the carrier strip engages the curved surface of said full exit hump.

5. The seal dispenser of claim 1, wherein said clamshell dispenser is formed of a thin plastic material, and the portions of said full exit hump are also formed of said thin plastic material.

6. The seal dispenser of claim 1, wherein said clamshell cover halves are hinged together along a side of said clamshell dispenser, and said clamshell dispenser is formed in substantially a square shape with respective said snap locking male and female members located at each corner of four corner to keep the cover halves of the clamshell dispenser closed against each other.

7. The seal dispenser of claim 6, wherein said clamshell is formed with four linear sides forming said square shape, and one said side of said clamshell forming a spine, and each said clamshell cover is pivoted about the spine by a respective hinge.

8. The seal dispenser of claim 1, wherein one said male and female snap lock members are partially surrounded by a respective said exit hump portion so that when snap locked together said full exit hump remains clamped together.

9. The seal dispenser of claim 1, wherein said core holder has collapsible speed bumps formed around a peripheral edge thereof to effectively increase a diameter of said core holder and increase a rolling friction of a roll of seals inserted on said core holder, and when one or more speed bumps are manually collapsed by a user of the clamshell dispenser, the collapsed speed bumps remain collapsed, whereby the effective diameter of said core holder is decreased to thereby decrease the rolling friction of the roll of seals.

10. The seal dispenser of claim 7, wherein said dispenser is constructed so that the carrier strip is unwound from said roll toward said spine, is routed over said full exit hump and exits said clamshell dispenser at said exit opening in a corner of said dispenser.

11. The seal dispenser of claim 1, wherein said clamshell dispenser is constructed with a first cover half formed with a stepped said core holder having a first diameter part for receiving thereon the core of said roll of seals, and wherein said stepped core holder further includes a second diameter part, said second diameter part having a smaller diameter than the first diameter part, and wherein a second cover half of said clamshell dispenser includes a member, said second diameter part and said member forming male and female members so that said male member is received in said female member.

12. The seal dispenser of claim 11, wherein said male and female core holder members frictionally engage each other to hold respective center portions of said clamshell dispenser halves together.

13. The seal dispenser of claim 1, wherein an end of each said trough terminates adjacent a side of said clamshell dispenser equipped with a hinge.

14. A dispenser for dispensing seals removably attached to a carrier strip wound as a roll on a core, said dispenser comprising:
a clamshell formed from a sheet of plastic to define a first cover, a second cover and a spine where the first cover is hinged to the spine with a first hinge and the second cover is hinged to the spine with a second hinge so that said first and second covers are movable between an open position and a closed position;
said spine defining a side edge of said dispenser between a first corner and a second corner, said spine having one end terminating at said first corner of said clamshell, and further including an exit opening adjacent said first corner so that the carrier strip and said seals can exit the clamshell through the exit opening;
a first trough formed into an outer surface of said first cover, said first trough formed inwardly from the outer surface of said first cover toward an internal portion of said clamshell, then laterally parallel to the outer surface of said first cover, and then formed upwardly toward the outer surface of said first cover;
a second trough formed into an outer surface of said second cover, said second trough formed inwardly from the outer surface of said second cover toward the internal portion of said clamshell, then laterally parallel to the outer surface of said second cover, and then formed upwardly toward the outer surface of said second cover;
said first and second trough having complementary shapes to encircle a majority of a circumference of the roll of seals, but said first and second troughs do not extend along a central length of said spine between said first and second corners, and said first and second troughs engaging each other in a manner to frictionally clamp the first and second troughs together;
at least one snap locking male and female member for clamping said first and second covers of the clamshell in the closed position;
a roll of said seals wound around said core, and each said seal including a metal foil layer;
said dispenser having a core holder on which said roll of seals is placed so that said roll of seals and said core can be rotated for dispensing said seals; and
an exit hump located adjacent said first corner and over which said carrier strip is routed when pulled by the user to dispense one or more seals.

15. The seal dispenser of claim 14, wherein the metal foil layer of the seal assumes a first arc shape when wrapped around said core, and wherein said exit hump is formed with a curvature to remove the first arc shape and straighten the seal that is dispensed.

16. The seal dispenser of claim 14, wherein said exit hump is formed with a curvature that partially encircles one said snap locking male and female member.

17. The seal dispenser of claim 14, wherein said exit hump is constructed in two portions, one exit hump portion formed integral with said first cover, and another exit hump portion formed integral with said second cover, whereby when the first and second covers are hinged to the closed position, said exit hump portions are adjacent each other.

18. The seal dispenser of claim 14, wherein said core holder is formed as two hub parts, a first hub part is formed integral with said first cover, and and a second hub part formed integral with said second cover, and said first and second hub parts are frictionally engaged together, the core of the roll of seals is supported by and is in contact with both said first and second hub parts.

19. A dispenser for dispensing seals removably attached to a carrier strip wound on a core, said dispenser comprising:
a clamshell formed from a sheet of plastic, said clamshell having four linear sides and four corners, and said clamshell having a first cover and a second cover that are hinged together and movable between an open position and a closed position;
four separate snap locking male and female members, each located at a respective corner of said clamshell for snap locking said first and second covers in the closed position;
a roll of said seals wound around said core, and each said seal including a metal foil layer that assumes a first arc shape when wrapped around said core;
said dispenser having a core holder on which said roll of seals is placed so that said roll of seals and said core can be rotated for dispensing said seals;
an exit opening formed in one said corner of said dispenser through which said carrier strip and seals protrude so that said carrier strip is available for pulling by a user of the dispenser; and
a curved exit hump over which said carrier strip is routed when pulled by the user to dispense one or more seals, said exit hump positioned to form a second arc shape in the foil layer of the seal, in a direction opposite the first arc shape, said exit hump is constructed in two portions, one exit hump portion formed integral with said first cover, and another exit hump portion formed integral with said second cover, whereby when the first and second cover portions are hinged to the closed position, said exit hump portions are adjacent each other, and one said snap lock male and female member is partially encircled by a curvature of said exit hump portions to snap lock together said exit hump portions.

20. The seal dispenser of claim 19, wherein said dispenser is constructed to dispense sterile seals that are straightened and do not separate from the carrier strip when pulled from the dispenser.