TECHNICAL FIELD
Embodiments of this disclosure generally relate to dispensers for flexible sheet materials such as tissue or paper products and, more particularly, cutting systems for such dispensers.
BACKGROUND
Different types of devices for dispensing selected quantities of paper and other flexible sheet products, such as for use in restrooms, hospitals and/or other environments, have been developed in recent years. Some of these dispensers have incorporated mechanical cutting mechanisms that cut or perforate a portion of the paper as it is dispensed, without requiring a user to pull and tear the paper against a tearing mechanism. A drawback with some of these mechanical cutting mechanisms is that their blades or other devices can cause bunching, ripping, or inconsistent cutting of the paper while it is being dispensed, particularly when different grades of paper (i.e., heavier towel type or thinner, tissue type paper). Additionally, such dispensers and cutting systems may produce a significant amount of noise during operation, which noise may be undesirable or disruptive in hospitals, offices, or other environments. Accordingly, it can be seen that a need exists for a dispenser with a cutting mechanism that provides for reliable cutting or perforation of the sheet material/paper product without bunching or tearing, while also reducing noise generated as the sheet material is dispensed, and which addresses the foregoing and other related and unrelated problems in the art.
SUMMARY
Briefly described, according to aspects of the present disclosure, a dispenser for dispensing or distributing a selected/predetermined amount of sheet material, such as tissue or other paper products is provided, having a housing with a feed roller assembly rotatably mounted therein. The feed roller assembly can be configured/arranged to guide or feed a selected amount of sheet material out of a discharge chute of the dispenser housing. A cutting assembly or system further can be arranged adjacent or along the feed roller assembly, which cutting assembly will include a cutting portion configured to at least partially cut or perforate the sheet material at an interval, or upon feeding or passage of a selected/predetermined amount of sheet material, adjacent the cutting portion during or prior to the sheet being dispensed. The cutting assembly further can be in communication with the feed roller assembly so as to be actuatable and/or movable in coordination with the rotation thereof such that as the feed roller is rotated to dispense the sheet material, the cutting assembly can be actuated/moved to bring the cutting portion into engagement with the sheet material, whereupon the sheet material is at least partially cut or perforated so as to define or delineate a sheet of selected/predetermined amount/length for dispensing.
In one aspect, the cutting assembly or system can be integrated with a feed roller body of the feed roller assembly, for example, components or parts of the cutting mechanism, such as a blade or knife of the cutting portion, are at least partially disposed or housed within a cavity or chamber defined in or along the feed roller body. The blade of the cutting portion of the cutting system can include a series of teeth or serrated portions and can be extendable or movable at least partially out of one or more slots or openings defined along the feed roller body. The cutting assembly further can include a base or support portion pivotally or rotatably mounted within the feed roller body, and one or more follower arms, each having a body movably coupled to the feed roller body, so as to be movable/rotatable therewith. The follower arms further can be connected to, or otherwise in communication with the base of the cutting assembly, including being fixedly or adjustably connected to the base of the cutting assembly. In addition, each of the follower arms can include a cam or follower located at a second end of each follower arm and movable along a track or race defined along the dispenser housing, e.g., in or along one or more of the side walls of the dispenser housing.
As the feed roller body is rotated during a dispensing operation to dispense a selected portion of the sheet material, the followers of each of the follower arms of the cutting system will be guided or moved along the race or track defined along the dispenser housing. This track further can be configured so that, as the follower is moved therealong, its follower arm will be actuated or moved in relation to the feed roller body, causing the base portion to be moved or pivoted to extend the cutting portion at least partially out of the one or more slots or openings in the feed roller body sufficient to at least partially cut or perforate the sheet material. The cutting portion further generally will be moved into or toward engagement with the sheet material in a manner that substantially prevents bunching, ripping, or inconsistent cutting thereof. For example, the cutting portion generally will be moved radially out of the feed roller body, moving with the rotation of the feed roller body in a manner such that the teeth of the cutting portion do not drag against or scrape the sheet material. The cutting portion further may initially contact at least a portion of the sheet material at a prescribed/predetermined angle.
These and other advantages and aspects of the embodiments of the disclosure will become apparent and more readily appreciated from the following detailed description of the embodiments and the claims, taken in conjunction with the accompanying drawings. Moreover, it is to be understood that both the foregoing summary of the disclosure and the following detailed description are exemplary and intended to provide further explanation without limiting the scope of the disclosure as claimed.
BRIEF DESCRIPTION OF THE DRAWINGS
The accompanying drawings, which are included to provide a further understanding of the embodiments of the present disclosure, are incorporated in and constitute a part of this specification, illustrate embodiments thereof; and together with the detailed description, serve to explain the principles of the embodiments discussed herein. No attempt is made to show structural details of this disclosure in more detail than may be necessary for a fundamental understanding of the exemplary embodiments discussed herein and the various ways in which they may be practiced.
FIGS. 1A-B show partial cutaway, perspective views of dispensers that dispense a sheet material according to principles of this disclosure.
FIGS. 2A-C show side cross-sectional views of the dispenser of FIG. 1A.
FIGS. 3A-B show a side and front cross-sectional views according to FIG. 1B.
FIGS. 4A-B provide exploded views of the dispenser of FIG. 1A.
FIGS. 5A-B show exploded views of the dispenser of FIG. 1B.
FIGS. 6A-C show top, perspective, and exploded views of a cutting assembly according to principles of this disclosure.
FIG. 7 shows a partial cutaway, perspective view of a driven feed roller according to principles of this disclosure.
FIG. 8 shows a partially cutaway, perspective view of a manually driven feed roller according to principles of this disclosure.
DETAILED DESCRIPTION
As shown in FIGS. 1A-8, the present disclosure is directed to a dispenser assembly including a dispenser 10 and a supply 26 of sheet material 12, the supply 26 including sheet material 12, such as paper towel, tissue and/or other types of flexible sheet materials. The dispenser 10 has a rotatable feed roller assembly 4 for guiding or dispensing the sheet material 12, e.g., from a roll 28 or other supply arrangement, along a feed path 33 towards a discharge chute 30. The dispenser 10 also may have a cutting assembly 5 in communication with the feed roller assembly 4, and configured to at least partially cut or perforate the sheet material at a selected location or interval during, or prior to, dispensing of the sheet material to form separated/separable sheets of a prescribed or desired length (e.g., about 8″ to about 12″), though greater or lesser sheet lengths also can be provided, and with the feed roll of the feed roll assembly generally being selected to provide a paper length as set or desired for the particular use or customer. The cutting assembly 5 may be integrated with the feed roller assembly 4 and in communication therewith such that as the feed roller assembly 4 is rotated, at least a portion of the cutting assembly 5 can be moved or extended at least partially out of the feed roller and into engagement with the sheet material, to at least partially cut or perforate the sheet material in a manner that substantially prevents bunching, ripping, tearing, or inconsistent feeding of the sheet material 12 for dispensing the desired length sheets.
FIGS. 1A-3B show that the dispenser 10 may include a dispenser housing 14 generally having front 16, rear 18, bottom 19 and side 20/22 walls or portions. The side walls 20/22 of the dispenser housing 14 can be coupled or otherwise connected to a support mechanism 24, such as a pair of support arms 24A-B that support or hold the supply 26 of the sheet material 12. Additionally, the housing 14 may have a casing or cover 15 sized, dimensioned, or otherwise configured to at least partially enclose or cover the supply 26 of sheet material 12 and other components of the dispenser 10 within the housing (FIG. 2A-3B). The supply 26 of sheet material 12 may include a supply roll 28 that is rotatably mounted to the support arms 24, at one or more of its ends 28A/B, such as by one or more couplings or bushings 29, to enable the sheet material 12 to be dispensed or fed out of a dispensing throat or discharge chute 30 or other suitable aperture or opening provided along the dispenser housing 14, which discharge chute 30 may be positioned along the bottom portion 19 of the housing 14 as generally indicated in FIGS. 1A-B. The support mechanism, however, is not limited to a pair of support arms 24 and may include any suitable support mechanism or connection that allows for storage and dispensing of the supply 26 of sheet material 12, for example, the ends 28A/B of the supply roll 28 can be connected or otherwise rotatably fixed to the dispenser housing 14 by one or more brackets connected to the dispenser housing 14, or the ends 28A/B of the supply roll 28 may be disposed or arranged at least partially within one or more receptacles, grooves or slots defined along the dispenser housing.
Additionally, as shown in FIGS. 4A-5C and 7-8, the feed roller assembly 4 is mounted within the dispenser 10 and is configured to guide or drive the sheet material 12 along a distribution path 33 from the supply 26 to and out of the discharge chute 30 for dispensing or distribution of the selected or predetermined amount of the sheet material 12 (FIGS. 2A-C). The feed roller assembly 4 generally will include an elongated feed roller body 32 having an inner wall 31A (FIGS. 4B and 5B) and an outer wall 31B, with a cavity or chamber 66 defined within the interior of the feed roller body 32. The feed roller body can comprise a molded plastic, synthetic or other composite material, though other types of low or reduced static materials, such as wood and/or other materials, which also can include an insulating material applied thereabout, also can be employed. The feed roller body 32 may include a pair of substantially symmetrical hemispherical portions or sections 34/35 that can be mated together, such as by fasteners 37, though other suitable connections are possible such as one or more snap fittings, adhesives, etc. The feed roller body 32 will be connected to or otherwise disposed within the dispenser housing 14 in a manner so as to be rotatable for feeding, guiding or driving/pulling the sheet material 12 from its supply during a dispensing operation. The feed roller body 32 also can include one or more drive bands or belts 36 formed/disposed on, or coupled to, an outer or exterior surface 38 thereof. Such drive belts can include or be comprised of rubber, plastic, or other similar materials suitable to increase grip of the feed roller body and/or friction between the feed roller body and the sheet material 12, which can be engaged and pulled between the feed roller and one or more idler or pressing rollers 42 to thereby assist in the guiding, feeding or driving of the sheet material 12 as it is dispensed. It should be understood that, although FIGS. 4A-5B show four substantially equally spaced driving bands or belts 36, any number, size, arrangement and/or configuration of driving bands may be used without departing from this disclosure.
FIGS. 2A-2C, 3A, 4A, and 5A further illustrate that the dispenser housing 14 can include one or more pressing rollers 42 or other guide members at least partially arranged therein substantially proximate, or substantially adjacent to, the feed roller body 32. For example, as shown in FIGS. 2A-C, 3A, 4A, and 5A, at least one pressing roller 42 may be rotatably connected to the front portion 16 of the dispenser housing 10, such as by one or more arms or supports 44. The supports/arm 44 may include a body 46 that defines a recess or groove 48 at a first end 46A of the body that is configured, sized, or dimensioned to receive at least a portion of the pressing roller 42. The body 46 of the arms/supports 44 may also have protuberances or projections 50, such as along a top portion 45 or second end 46B of the body 46, which protuberances or projections 50 are configured to be at least partially received within one or more grooves or holes 52 defined along the front portion 16 of the dispenser housing, for example, to enable snap-fitting therein. The arms 44 further may bias or urge the pressing roller 42 against the feed roller body 32 so as to engage at least a portion of the sheet material 12 between the pressing roller 42 and feed roller body 32.
The pressing roller(s) 42 further may comprise a body 54 defined by a series of spaced portions 56 each having a radial surface 56A for engaging at least a portion of the sheet material 12, and can include bands of gripping material, e.g., a rubber or synthetic material, arranged thereabout to assist in pulling or guiding the sheet material 12 between the pressing roller 42 and feed roller body 32 without tearing, or otherwise causing damage to, the sheet material 12. It should be recognized that any number of pressing or guide rollers can be arranged about the feed roller body 32 to assist in guiding the sheet material 12, and any additional rollers may be fixed in a biased or a static arrangement. For example, a pair of idler guide rollers 47 can be arranged or positioned adjacent the discharge chute 30 and rotatably mounted to the sidewalls 20/22 of the dispenser housing 14 to guide or otherwise facilitate discharge of the sheet material from the discharge chute 30. The dispenser 10 further may include one or more fingers or guides 60 for positioning or guiding the sheet material 12 along the feed roller body 32 as the sheet material 12 is fed from the dispenser 10, as generally shown in FIGS. 2A-C. The fingers or guides 60 each can be connected to, or formed with, the front portion 19 of the dispenser housing 14, and can have an elongated body 62 that is curved, or otherwise shaped, such that the body 62 is urged or biased against the feed roller body 32 at first 62A and second 62B ends of the body 62, or other portions thereof. The body 62 generally will have cylindrical shape, though other shapes are possible, and the body 62 may have spherical portions 64 positioned along one or more of its ends, e.g., first end 62A or second end 62B.
As shown in FIGS. 2A-8, the dispenser 10 will include a cutting assembly 5 arranged along the feed roller body 32, which cutting assembly 5 can be integrated with the feed roller body 32. For example, as shown in FIGS. 4B and 5B, the cutting assembly 5 can be at least partially arranged or housed within the cavity or chamber 66 defined within the interior of the feed roller body 32. As shown in FIGS. 7-8, the feed roller body 32 can have counterweights 67 arranged therein to counterbalance or otherwise compensate for the integrated cutting assembly, and which can help substantially balance rotation, and/or further drive of the feed roller body 32 (i.e., driving manual operation thereof) as needed. The cutting assembly 5 further can be movable, with rotation of the feed roller body 32, to engage and at least partially cut or perforate the sheet material 12 during, or prior to, dispensing of the sheet material 12 from the dispenser 10. The cutting assembly 5 will include a cutting portion or component 68 having at least one body 70 that includes a front portion or end with a cutting edge 69, such as a cutting blade that also can have a series of teeth 72 or other serrated, jagged or saw-like portions. However, the cutting edge 69 can include any other sharpened portions suitable to at least partially cut or perforate the sheet material, such as a knife or bladed cutting edge, or other suitable cutting mechanisms, without departing from this disclosure. The cutting component 68 also can include a series of generally symmetrical spaced bodies 70, e.g., three bodies 70 each having a series of teeth 72, such as shown in FIGS. 6A/C; however, the cutting component 68 can have any number, arrangement, or configuration of cutting portions or mechanisms without departing from this disclosure. The body/bodies 70 of the cutting component 68 further can be formed from a metal, e.g., aluminum or light-gauge steel, though other suitable materials, such as a plastic or other composite material, also can be used without departing from this disclosure.
Additionally, as shown in FIGS. 2A-8, the cutting assembly 5 also can include a base or support 74 having a body 76 with a generally rectangular or plate-like shape, though other shapes are possible without departing from this disclosure. The cutting portion 68 may be coupled, connected, or otherwise fixed along first end 78 of the body 76 of the base 74, such as by one or more threaded fasteners 80, e.g., screws or bolts, can be integrally formed therewith, without departing from this disclosure. The base 74 can have a height or lengths sufficient to fit within and move into/out of the feed roller without interference or binding therewith. For example, the base can range from about 25 mm to about 45 mm in length. The base 74 can be movably mounted within the feed roller body 32 such that the base 74 moves, e.g., rotates or pivots, with rotation of the feed roller body 32, and is further movable radially so at least the cutting edge 69 of the cutting component 68 will be at least partially extended out from one or more openings or slots 82 defined along the feed roller body 32, e.g., the cutting edge or teeth 72 of the of the cutting portion 68 can move out of a slot or series of corresponding openings or slots 82 defined along the outer circumferential wall 84 of the feed roller body 32, sufficient to at least partially cut or perforate the sheet material 12. Although a series of evenly spaced slots 82 are shown, any number, arrangement or configuration of slots, e.g., one continuous slot or multiple slots/openings, also can be employed without departing from this disclosure.
As further shown in FIGS. 2A-8, the base 74 will be connected to, or otherwise in communication with, one or more lever or follower arms 85, which follower arms 85 generally will also be coupled to the body 32 of the feed roller assembly 4 so as to be rotatable therewith. Each of the follower arms 85 further will include a follower 86 configured to move or ride along a track or race 88 that can be formed, defined or arranged along the dispenser housing 14, as the feed roller body 32 rotates to dispense the sheet material 12. As generally shown in FIGS. 2A-C, this track or race 88 generally will be shaped, dimensioned, or otherwise configured such that, as each follower 86 is moved therealong, its follower arm is moved in relation to a central axis CA of the feed roller body 32 to rotate or pivot the base 74 in a manner sufficient to thereby move and/or extend the cutting portion 68 at least partially out from (FIG. 2B) and back into (FIG. 2B) the slot(s) or opening(s) 82 in the feed roller body 32.
As generally shown in FIGS. 6A-C, the follower arms 85 may have an elongated body 90 with a generally curved shape sized, dimensioned and/or configured to avoid inhibiting or interfering with movement/rotation of the feed roller 32. The size and/or configuration of the follower arms can vary for supporting different size drums providing for different paper lengths, while also providing sufficient motor clearance during electronic application. The arms 85 further may include any suitable shape, such as generally rectangular, etc., without departing from this disclosure. The body 90 of each follower arm 84 can have a first end 90a and second end 90b, each with a generally arcuate, curved or semi-circular shape, and with one end, e.g., the first end 90a, having a smaller diameter than the other end, e.g., the second end 90b, though the first and second ends 90a/b may have any dimension and/or suitable shape, e.g., an oval, elliptical, square, diamond, or triangular shape or configuration, without departing from this disclosure. The follower 86 of each arm 85 may be arranged along, or substantially adjacent to, the first end 90a of the follower arm body 90, with the follower arm 85 connected to the feed roller body 32 and the base 74 of the cutting assembly 5 at its second end 90b. The followers 86 will have a body 92 of a generally cylindrical shape rotatably mounted to its arm 85 at 94, e.g., by being fitted on, or otherwise connected to, a fastener pin, projection or protrusion 96 connected to, or formed with, the first end 90a of the follower arm 90. For example, the projection/protrusion 96 that is at least partially received within a passage 94 defined in the follower body 92 such that the follower 86 is rotatable or otherwise movable thereabout. The protrusion/projection 96 may have a generally cylindrical shape that is complementary to an interior surface 98 of the follower body 92, though the protrusion/projection 96 can have any shape without departing from the present disclosure.
Additionally, the second end 90b of the body 90 of the follower arm 85 can include a mounting portion 100 for connecting the follower arm 85 to the base 74 and the feed roller body 32. This mounting portion 100 can have a first portion 102 pivotably or rotatably coupling the follower arm 85 to the feed roller body 32, and a second portion 104 fixing or otherwise mounting, the follower arm 85 to the base 74 of the cutting assembly 5. In one example, the first portion 102 can include a generally cylindrical body 106 at least partially received within a hole or aperture 108 defined in the side portions 110/112 of the feed roller body 32 such that the follower arm is rotatable, pivotable, or otherwise movable thereabout to allow for relative movement between the follower arm 85 and the feed roller body 32. The second portion 104 can include a projection or protrusion 114 extending from the first portion 102 and configured to be received within a hole or opening 116 defined along the base 74 of the cutting assembly 5, or within one or more mounting blocks 118 mounted to, or fixed with, the base 74. The mounting blocks 118 can be positioned along the sides 120/122 of the body 76 of the base 74 at or substantially adjacent a second end 79 thereof to fix the follower arm and base to prevent relative movement therebetween.
As shown in FIGS. 4A-B, and 5A-B, the cam tracks or races 88 defined/located along the dispenser housing may include a channel or groove 124 defined in at least one of the side walls 20/22 of the dispenser housing 14. Each channel or groove 124 has opposing facing side walls 126/128 defining guide surfaces along which the follower 86 moves as the feed roller body 32 is rotated. For example, an exterior surface 93 of the follower can at least partially engage and ride along one or both of the side walls 126/128 as the follower is moved along its track/race 88. The channel or groove 124 defines a path that can be curved or have a generally oblong, oval, or elliptical configuration that further can be eccentric or offset with respect to the central axis CA of the feed roller body 32. Each track/race 88 also may have a series of cam sections or areas that cause the follower arm 85 to move radially with respect to the feed roller body 32 to move the cutting portion 68 into and out from the openings/slot(s) 82 in the feed roller body 32.
As further shown in FIGS. 2A-8, the base 74 will be connected to, or otherwise in communication with, one or more lever or follower arms 85, which follower arms 85 generally will also be coupled to the body 32 of the feed roller assembly 4 so as to be rotatable therewith. Each of the follower arms 85 further will include a follower 86 configured to move or ride along a track or race 88 that can be formed, defined or arranged along the dispenser housing 14, as the feed roller body 32 rotates to dispense the sheet material 12. As generally shown in FIGS. 2A-C, this track or race 88 generally will be shaped, dimensioned, or otherwise configured such that, as each follower 86 is moved therealong, its follower arm is moved in relation to a central axis CA that extends laterally through a center portion of the feed roller body 32 as shown in FIGS. 3B, 4A, and 5A, and about which the feed roller rotates, to rotate or pivot the base 74 in a manner sufficient to thereby move and/or extend the cutting portion 68 at least partially out from (FIG. 2B) and back into (FIG. 2B) the slot(s) or opening(s) 82 in the feed roller body 32.
As shown in FIGS. 4A-B, and 5A-B, the cam tracks or races 88 defined/located along the dispenser housing may include a channel or groove 124 defined in at least one of the side walls 20/22 of the dispenser housing 14. Each channel or groove 124 has opposing facing side walls 126/128 defining guide surfaces along which the follower 86 moves as the feed roller body 32 is rotated. For example, an exterior surface 93 of the follower can at least partially engage and ride along one or both of the side walls 126/128 as the follower is moved along its track/race 88. The channel or groove 124 defines a path that can be curved or have a generally oblong, oval, or elliptical configuration that further can be eccentric or offset with respect to the central axis CA of the feed roller body 32. Each track/race 88 also may have a series of cam sections or areas that cause the follower arm 85 to move radially with respect to the feed roller body 32 to move the cutting portion 68 into and out from the openings/slot(s) 82 in the feed roller body 32.
As shown in FIGS. 2A-B, the cutting portion 68 may be in a retracted position within the feed roller body 32, until the feed roller is rotated or moved by an amount sufficient to dispense the selected amount/length of sheet material, whereupon the follower 86 is moved towards and along a first section 130 of the track/race 88 that causes the follower arm 85 to rotate, pivot or otherwise move with respect to the feed roller body 32. As a result, the base 74 of the cutting system 5 is moved/pivoted such that the cutting portion 68 is caused to project and/or at least partially extend out of the slots/openings 82 in the feed roller body to at least partially cut or perforate the sheet material 12 in timed cooperation/coincident movement with the rotation of the feed roller. Subsequently, as shown in FIG. 2C, as the feed roller continues to rotate to pull/feed the selected amount of sheet material 12, the follower(s) 86 will continue to move along a second section 132 of the track/race 88, causing the follower arm 85 to be pivoted, rotated or otherwise moved with respect to the feed roller body 32, to thereby retract or return the cutting portion 68 to its retracted position substantially within the feed roller body 32. As shown in FIGS. 2A-C, the second portion 132 of each track 88 may be closer to the central axis CA of the feed roller than the first portion 130 of each track 88.
As a result of the cooperative radial and rotary movement of the cutting portion of the cutting assembly with the rotation of the feed roller, the sheet material 12 can be at least partially cut or perforated in a substantially consistent manner without generally causing ripping, tearing or bunching thereof. For example, the cutting portion will be moved radially out of the feed roller body 32, while also rotating with the rotation of the feed roller body, such that the teeth of the blade are not dragged or scraped along the sheet material. The blade/teeth may initially contact or engage the sheet material 12 at an angle indicated at 87 of about 40° to about 60° with respect to an axis X (e.g., a horizontally extending axis X shown in FIGS. 2A-2B extending perpendicular to the central axis CA of the feed roller body), and move therewith to create a stamped cutting/slicing action, as shown in FIG. 2B. Additionally, during cutting of the sheet material, the cutting portion may exert a force of about 1 N to about 3 N, e.g., about 1.8 N, on the sheet material.
The automatic dispenser further can have a manual assist mode, wherein the dispenser includes a switch or sensors in communication with the feed roller assembly, such that when a user pulls on a portion of the sheet material, for example, a portion of sheet material extending out of the discharge chute 30, the motor actuates/rotates the feed roller body 32 to assist in dispensing a selected amount of sheet material.
The feed roller assembly also can be manually driven. FIG. 8 shows a feed roller assembly 250 that has manually operable/driven feed roller assembly, e.g., it allows a user to pull on at least a portion of the sheet material or turn a knob or lever 252 to dispense a selected amount of sheet material. The knob or lever 252 can include, or be in communication with, one or more gear assemblies 254 to transfer torque, e.g., caused by rotation of the knob by a user, to the feed roller body 32. For example, gear assembly 254 can be formed with the knob 252 and include a hoop or ring gear 258 with a series of teeth 260 that engage a series of teeth 262 of gear 264 at least partially received within the hoop or ring gear 258 and connected to an end of the feed roller body 32b, so that as the knob 252 is actuated, the feed roller body 32 is rotated to dispense a selected about of the sheet material. The gear assembly 254 also can include a stop mechanism 266 with one or more teeth 268 operable to engage corresponding teeth 270 on an outer surface 272 of the hoop gear 258 to prevent reverse rotation of the feed roller 32 and bunching or tearing of the sheet material. The gear assembly 254 further can be biased, e.g., by one or more springs or other suitable biasing mechanism, to rotate the feed roller as, or after, a user actuates the knob 252, or pulls on a portion of the sheet material, to dispense a selected amount thereof. The biasing may cause a selected amount of rotation of the feed roller body so as to return the cutting portion 68 to a position within the feed roller body after manual dispensing and/or cutting of the selected amount/length of sheet material.
The foregoing description generally illustrates and describes various embodiments of the present disclosure. It will, however, be understood by those skilled in the art that various changes and modifications can be made to the above-discussed construction of the present disclosure without departing from the spirit and scope of the present disclosure as disclosed herein, and that it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as being illustrative, and not to be taken in a limiting sense. Furthermore, the scope of the present disclosure shall be construed to cover various modifications, combinations, additions, alterations, etc., above and to the above-described embodiments, which shall be considered to be within the scope thereof. Accordingly, various features and characteristics of the present disclosure as discussed herein may be selectively interchanged and applied to other illustrated and non-illustrated embodiments, and numerous variations, modifications, and additions further can be made thereto without departing from the spirit and scope of the present invention as set forth in the appended claims.
Patent Grant
12358750
