CA1262446A - Rolled material dispenser with feed roller containing a sliding cutter - Google Patents
Rolled material dispenser with feed roller containing a sliding cutterInfo
- Publication number
- CA1262446A CA1262446A CA000520668A CA520668A CA1262446A CA 1262446 A CA1262446 A CA 1262446A CA 000520668 A CA000520668 A CA 000520668A CA 520668 A CA520668 A CA 520668A CA 1262446 A CA1262446 A CA 1262446A
- Authority
- CA
- Canada
- Prior art keywords
- feed roller
- dispenser
- web
- blade
- roller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000000463 material Substances 0.000 title claims abstract description 41
- 235000014676 Phragmites communis Nutrition 0.000 abstract description 3
- 230000007246 mechanism Effects 0.000 description 18
- 210000002320 radius Anatomy 0.000 description 7
- 230000002093 peripheral effect Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 3
- 241000905957 Channa melasoma Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036346 tooth eruption Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
- B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
- B26D1/56—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which travels with the work otherwise than in the direction of the cut, i.e. flying cutter
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K10/00—Body-drying implements; Toilet paper; Holders therefor
- A47K10/24—Towel dispensers, e.g. for piled-up or folded textile towels; Toilet paper dispensers; Dispensers for piled-up or folded textile towels provided or not with devices for taking-up soiled towels as far as not mechanically driven
- A47K10/32—Dispensers for paper towels or toilet paper
- A47K10/34—Dispensers for paper towels or toilet paper dispensing from a web, e.g. with mechanical dispensing means
- A47K10/36—Dispensers for paper towels or toilet paper dispensing from a web, e.g. with mechanical dispensing means with mechanical dispensing, roll switching or cutting devices
- A47K10/3631—The cutting devices being driven manually
- A47K10/3643—The cutting devices being driven manually by pulling the paper
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
- A47K10/00—Body-drying implements; Toilet paper; Holders therefor
- A47K10/24—Towel dispensers, e.g. for piled-up or folded textile towels; Toilet paper dispensers; Dispensers for piled-up or folded textile towels provided or not with devices for taking-up soiled towels as far as not mechanically driven
- A47K10/32—Dispensers for paper towels or toilet paper
- A47K10/34—Dispensers for paper towels or toilet paper dispensing from a web, e.g. with mechanical dispensing means
- A47K10/36—Dispensers for paper towels or toilet paper dispensing from a web, e.g. with mechanical dispensing means with mechanical dispensing, roll switching or cutting devices
- A47K10/3631—The cutting devices being driven manually
- A47K2010/365—Triggering mechanism for the blade
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T225/00—Severing by tearing or breaking
- Y10T225/30—Breaking or tearing apparatus
- Y10T225/393—Web restrainer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/465—Cutting motion of tool has component in direction of moving work
- Y10T83/4766—Orbital motion of cutting blade
- Y10T83/4795—Rotary tool
- Y10T83/4804—Single tool action drive
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/465—Cutting motion of tool has component in direction of moving work
- Y10T83/4766—Orbital motion of cutting blade
- Y10T83/4795—Rotary tool
- Y10T83/4812—Compound movement of tool during tool cycle
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/889—Tool with either work holder or means to hold work supply
- Y10T83/896—Rotatable wound package supply
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Advancing Webs (AREA)
- Replacement Of Web Rolls (AREA)
- Nonmetal Cutting Devices (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Details Of Rigid Or Semi-Rigid Containers (AREA)
Abstract
ROLLED MATERIAL DISPENSER WITH
FEED ROLLER CONTAINING A SLIDING CUTTER
ABSTRACT OF THE DISCLOSURE
A dispenser for rolls of flexible sheet material has a feed roller with a pair of pinch rollers spaced around the reed roller periphery to guide a web of the material from a supply roll to the dispenser exit.
A cutting blade is slidably mounted within the feed roller to move in a path parallel to and offset from a radius of the feed roller with cam followers movable with the blade and extending beyond the ends of the reed roller disposed to reciprocate along this radius. Stationary cams are mounted adjacent the ends of the feed roller engaged with the cam followers, respectively, to positively project the blade cutting edge beyond the feed roller periphery to cut the web and retract such edge as the feed roller is rotated by drawing on the web at the dispenser exit.
FEED ROLLER CONTAINING A SLIDING CUTTER
ABSTRACT OF THE DISCLOSURE
A dispenser for rolls of flexible sheet material has a feed roller with a pair of pinch rollers spaced around the reed roller periphery to guide a web of the material from a supply roll to the dispenser exit.
A cutting blade is slidably mounted within the feed roller to move in a path parallel to and offset from a radius of the feed roller with cam followers movable with the blade and extending beyond the ends of the reed roller disposed to reciprocate along this radius. Stationary cams are mounted adjacent the ends of the feed roller engaged with the cam followers, respectively, to positively project the blade cutting edge beyond the feed roller periphery to cut the web and retract such edge as the feed roller is rotated by drawing on the web at the dispenser exit.
Description
ROLLED MATERIAL DISPENSER WITH
FEED ROLLER CONTAINING A SLIDING currER
This invention relates to rolled material dispensers and, more specifically, to a flexible sheet material dispenser such as usable for dispensing paper towels with a cutter mechanism housed within the feed roller of the dispenser adapted to cut a web of flexible sheet matePial into individual lengths of the material.
Dispensers for rolled flexible sheet material, sueh as paper toweling, are well known, a great many of such dispensers including mechanisms for perforating or severing a web of the m~terial to di~ride the web into individual sheets. The perforating or severing mechanism used in a number of these dispensers has included a rotatably mounted knife and a cooperating rotstably mounted roller having A slot therein for receiving the radially outermost portion of the knife as the knife rotates past the roller. A web of flexible sheet material is passed between the roller and the knife to be perforated or severed when the radially outward knife portion enters the slot in the roller.
Such mecbanisms are satisfactory for perforating or severing relatively unstretchable flexible sheet mflterials, such as uncreped paper toweling. However, with the incre&sed use of relatively stretchable flexible sheet materials, such as embossed or creped paper toweling, the prior art perforating and severing mechanisms have proved unsatisfactory because the web of sheet material tends to stretch about the cutting edge of the knife instead of being effectively perf~
reted or severed thereby.
Although precision rctary shears are known which could be employed to overcome this problem, such shears are much too expensive to be used in nexible sheet material dispensers designed for installatiorl to be used in both commercial and private washrooms.
Vsrious devices for cutting off sheets of creped web material have been proposed. One is exemplified in DeLuca Patent 4,188,~44 issued Febru~ry 19~ 198û, wherein ~ toothed kni~e is pivotally mounted internally of the feed roller within the towel dispenser. However, the towel cut produced by these internal pivoted toothed knives produces a wavy shape due to the pivoting action which the toothed knife undergoes. The points and roots of the straight knife teeth do not emerge from the feed roller on a straight line. Where the cutting knife is mounted to be movable radially outwardly from within a roller over which a web of paper is passing, thi~ radially movable cutting knife unduly stretches the paper away from the feed roller without properly cutting the web.
In dispensers for crepe paper toweling where the cutting mechanism is intended to be actuated solely by pulling on the paper web, usually with the web hands of the intending user, it is important that the required pulling force be minimized to prevent the web from tearing prematurely in the intending user's fingers. To minimize the tearing effort, the cut must be as short as possible and hence must be 90 to the length of the web of sheet material and without a wave form at the location of the web cut. In dealing with crepe paper toweling, the cutting mechanism must also be designed such that the cutffng mechanism will effectively cut the paper with a minimum of paper movement and not significantly stretch the creped paper.
SUMMARY OF THE INVENTION
The rolled material dispenser of this invention is designed to dispense predetermined lengths of creped paper from a supply roll of toweling material employing a cutting mechanism operable solely by pulling on the free end of the paper web exposed at the dispenser ~-?~:~4~
exit. The web Is cut into predetermined lengths with the cut being mflde at 90 to the length of the towel web, the cut being free of wAves and the cut being made with ~ minimum of pulllng effort required to be applied to the free web end.
The rolled material dispenser of this invention overcomes the objections discussed above with rererence to prior art proposals in dispensing crepe paper towellng by using a str~ight ~liding knife mounted inside a ~eed roller having a high rriction exterior surface.
The mountlng ~or the slidable cutting blade assures movement of the blade in a path p~r~llel to and of~set ~rom a rsdiu~ of the feed roller. Sliding the knife blade in and out o~ the feed roller along the same plane as the plane of the knife teeth serves to assure the com-pletion of a perfectly straight cut. By having the plane Or the knife offset i'rom a radius of the feed roller, the cutting blade emerges with the knife moving forw~rd in the ssme direction ss the rothtion of the feed roller to allow the blade teeth to penetrate the towel web without unduly stretching it awQy rom the feed roller.
Reciprocating movements are impsrted to the cutting blade as the feed roller is rotated by drawing on the web of m~terisl exposed at the dispenser eldt by providing cam ~ollowers movable with the blade. These csm follower~ extend beyond the ends Or the feed roller and are dispo~ed to reciprocste along the r~diu~ of the feed roller from which the cutting blade is laterally offset. St~tionary cams are mounted adjacent the ends of the feed roller engaged with the cam follower~ respectively, to positively project the blade cutting edge beyond the feed roller periphery to cut the web and positively retract such edge as the feed roller is rotated by drawing on the web at the dispenser exit.
With the foregoing in mind, it is an object of an aspect of the present invention tion to provide a flexible sheet materisl dispenser well suited to the handling of creped paper toweling wherein the mechanism for effectively cuttlng the toweling web m~kes a straight cut perpendicular ~tj~
to the length or the web while cuttirlg the web into predetermined lengths as needed for intending towel users.
It ls an o~Ject of ~n aspeot of the lnvertlon to ~rovld~ a dlspense~
including a cutting blflde slidably mounted within the di~penser feed roller wherein the cuttlng edge of the blade i9 projected outwardly beyond the periphery or the reed roller along ~ path p~rallel to ~nd offset from a radius of the ~eed roller to cut the web as it passes over the feed roller.
It is an cbject of an asp~ct of the invention to provide a flexible sheet msterlsl dispenser wberein a cuttlng blade i~ slidably mounted within a ~eed roller and stationary cam~ external or the feed roller operste to positively project and retract the cutting blade incident rotation of the feed roller a~ the towel web i9 withdrawn from the dispenset esit by an intending user.
It is an object of an aspect of the invertion to pr~vide a r o 1 1 e d material dispenser for e~f0ctiYely making a straight cut perpendicular to the web of material being withdrawn from the dispenser which is compact, rugged and economical to manu~acture and ideally suited for both commercial and private installations.
- 4a-An aspect of the invention is as follows:
A dispenser for rolts of flexible sheet materlal comprising:
a chasqi3 adapted to be attached to 8 wall;
means carried by said chsssis îor rotatably supporting a roll of flexible sheet materi~l;
a feed roller rotatably mounted on ~aid chassis for guiding a web of sheet material ~rom the roll to 8 position to be grasped by a user so that the user may pull the web out Or the dispenser, said feed roller hhving aperture means rormed longitudin~lly in the periphery thereo~;
carrler means within said ~eed roller h~ving a cutting blsde mounted thereon and cam ~ollowers extending beyond the opposite ends oi~ s&id feed roller9 ssid blade havlng a cutting edge;
means mounting said carrier mesns in said feed roller for movement o~ said cutting blade in a Qath parallel to and lAterally o~f-set from a radiu~ of said ~eed roller; and stationary cams mounted on said chassiq adjacent the ends o~ said ~eed roller, respectively, ~aid cam followers being engaged with said stationary cams to positi~ely move said blade in said path pro~sc-ting gsid cutting edge beyond said feed roller periphery through said aperture mean~ to cut the web and retracting said edge as said feed roller rotate~.
The foregoing object~ o- the invention will become apparent upon consideration o~ the detailed description o~ a preferred embodiment of the invention in connectlon with the accompanying dra~ings.
~ igure 1 is a side elevstional, ~riew with portions in section, of the rolled msterial dispenser of this in-~rention displaying the feed roller containing a sliding cutter.
Figure 2 is an en;arged sectional view o~ the feed roller containing ths sliding cutter with a portion of the ~eed roller broken ~wsy.
Flgure 3 Is a sectional view taken on line 3-3 o~ Figure 2.
Figure ~ is a view similar to Figure 2 but show}ng the feed roller and sliding cutter rotated to a dif~erent operated condition.
Figure 5 is a side elevational view of the feed roller showing the longitudinal aperture means.
Figure 6 is ~n elevntion~l view of the cutting blflde for the feed roller interior.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to Fig~re 1 on the drawings, the general outline of a fairly conventional dispenser cabinet chassis 10 is illustrated. The dispenser chassis 10 has a back wall 12 which will be provided with appropriate openings (not shown) to accom modate fasteners for att~ching the chassis 10 of the dispenser to a wall.
A msin supply roll R of fle~tible sheet material, such as paper toweling, may be suitably supported on a yoke 14 having its legs pivotally connected to clips 16 tixedly secured to the back wall 12 of dispenser chassis 10. The legs of yoke 14 each carry a cup 18 at their free ends, these oppositely facing cups 18 entering into the opp~
site ends of the core of supply roll R such that roll R rests against the back wall 12, moving downwardly as towel material is withdrawn from the roll. This mounting for a supply roll R within a dispenser chassis 10 is fairly conventional in the rolled material dispenser art and ~urther discussion of such structure should be unnecessary.
Further, generally well known features for the dispenser chassis 10 may include the front portion consisting a cAbinet cover pivoted to the back wall la o~ chassis 10 to enable this cover to be opened for successive reloading of fresh rolls R onto yoke 14 in the chassis 10. An opening 20 at the lower front portion OI chassis 10 provides the dispenser exit as by the front wall 22 of the cover of chassis 10 terminating above the bottom wall 2~ of chassis 10.
The web W of flexib~e sheet material witbdrawn off supply roll R is threaded into the dispensing and cutting mechanism mounted within the chassis 10 which may now be described in detail.
Referring to Figures 1-4, a feed roller 30 is rotataMy mounted on stub shafts 32 extending axislly outwardly from the opposite ends of feed roller 30. Each stub sheft 32 has one end thereof fixedly securing a central bore 34 in the hub 36 of feed roller 30, this structure being best seen in Figure 3.
The outer end ~f one of the stub shafts 32 may be provided with the conventional hand ~Nheel (not shown) fixedly secured thereto9 this hand wheel enabling manual rotation of the feed roller 30 from a point externally of the dispenser chassis 10 should such manual rotation of feed roller 30 be necessary as in threading the web W of flexible sheet material from supply roll R through the dispensing and cutting mechanism to the dispenser exit 20.
Each of the feed roller hubs 36 is formed with a pair of slots 38 aligned along a diameter of the feed roller. These pairs of slots in the hubs 36 at the opposite ends of the feed roller 30 form part of the mounting means for the carrier supporting the cutter blade as will be described subsequently.
A carrier for cutting blade 40 is provided by a pair of plates 42. One plate 42 is fixedly mounted on each end of the cutting blsde 40 with these plates 42 being perpendicular to the length of blade 4n.
As may be best seen in Figure 6, the blade 40 with the carrier provided by plates 42 at the opposite ends of the blade 40 is formed with a series of teeth 44 spaced along the length of blade 40. In the specific embodiment illustrated, four pairs of teeth ~4 are provided along the length of blade 40 with these pairs of teeth 44 being separated by recesses 46.
As will be seen from Figure 5, the periphery of feed roller 30 is provided with aperture means consisting of a series of longitudinally aligned slots 48, four such slots being shown in the illustrated embodiment on Figure 5 with these slots being separated by continuous surface portions 50 which are part of the peripheral surface of feed roller 30.
In the mounting of cutting blade 40 within feed roller 30 as will be more apparent hereinafter, the p~irs of teeth 44 on blade 40 separated by recesses 46 are projected outwardly through the four aligned slots 48 of feed roller 30 while the solid portions 50 of the feed roller periphery pass down into the three recesses 46. By uti-lizing this form of cuttlng Made 40 wlth the perticulclr ~perture me~ns provided by slots 48 in the periphery of feed roller 30, the cutting action performed on the web OI flexible sheet material passing o~rer the feed roller 30 produces A straight line cut parallel with the axis of feed roller 30 but leaving three small uncut portions in the web corresponding to the width of recesses 48 and length of solid portions 50 on the periphery of feed roller 30.
By leaving these minor uncut portions of the web W, spaced across the width of the web, the continuity of web W is maintained while the web has been substantially cut but is still within the confines of the dispenser chassis 10 before reaching the dispenser exit 20. Once the web is pulled further from the dispenser chassis 10 by the intending user of the now defined sheet length, a minor degree of pulling force applied by the intending user will easily separate the spaced uncut portions left by the configuration of cutting blade 40 and spaced slots 48 in feed roller periphery 30 with the intending user effectively obtaining the apprQpriate length of toweling.
Each of the carrier plates 42 fixedly mounted on the opposite ends of cutting blade 40 is provided with a pair of guide pins 60 extending normal to the plane of plate 42. These pins ~0 are spaced on each plate 4a to be positioned to guidingly engage with the aligned slots 38 formed in each hub 36 at the ends of feed roller 30. With this mounting means for the carrier plates 4a fixed to the ends of elongated cutting blade 40, the cutting blade 40 is reciprocable in a path which is parallel to and laterally offset from a radius of the feed roller, this rsdius corresponding to the axis of the aligned slots 38 which extend along a diameter of feed roller 30. Thus, not only does the mounting means enable movement of the cutting blade in R path parallel to and laterfllly offset from this radius of feed roller 30 but also the mounting means provides for reciprocation of the guide pins 60 along this same radius of the feed roller 30.
One of the guide pins on each of the carrier plates 42 at the ends of cutting blade 40 is pro~ided with a cflm ~ollower 62. This cam follower 62 at each end of feed roller 30 extends outwardly beyond the ends of feed roller 30 as m&y be best seen on Figure 3.
Thus, while the guide pins 60 on each cArrier plate 42 are basicAlly enclosed within the pair of aligned slots 38 in the hub 3~ at each end of roller 30, the cam follower 62 extends outwardly beyond the ~eed roller end to engage with a stationary cam mounted on the dispenser chassis as will be described subsequently.
Within the lower forward portion of dispenser chassis 10, immediately adjacent the dispenser exit ao, there is provided a suitable casing to house the feed roller and other components making up the dispensing and cutting mechanism. The location of this casing within the dispenser chflssis 10 is shown in Figure 1 while its components may generally be seen In the sectional view of Fi~ure 3.
The casing includes a semi-cylindrical housing 70 having an inter-nal diameter somewhQt lsrger than the diameter of feed roller 30.
Housing 70 extends from the point where the web W of flexible sheet material entets the dispensing and cutting mechanism, terminating adja-cent the dispenser exit 20. The housing 70 extends across the width of the dispenser chassis 10 between the sides of the pivotally mounted cover of dispenser chassis 10. Housing 70 may have its ends closed by end plates 72, one such plate being disposed at each end of housing 70 with the plate 72 appropriately secured to the end of housing 70 in the relation flS shown in secffon on Figure 3.
Within the casing made up by semi-cylindrical housing 70 and the two end plates 72 closing the ends of such housing, there is pro-vided a lead-in pinch roller 74. Preferably, this pinch roller is mounted on fl shaft and is biased by spring means (not shown) against the peripheral surface of feed roller 30. A second pinch roller 76 is mounted, similar to the mounting for pinch roller 74, with pinch roller 76 being disposed im mediately adjacent the dispenser exit 20.
Thus, pinch l-oller 76 will be spring billsed by me~ns (not shown) against the peripheral surface of feed roller 30 similar to pinch roller 74~
The path of the web W of flexible sheet material coming from supply roll R as it moves through the dispensing and cutting mechanism mey now be described. After leaving roll R carried on pivotally supported yoke 14 the web W initially passes clockwise around the pinch roller 74 as viewed on Figures 1, 2 and 4. Web W then proceeds counterclockwise around the high friction peripheral surface of feed roller 30. The presence of semi-cylindrical housing 70 which gen-erally concentrically encloses feed roller 30 serves to guide and thereby assist in threading the leading end oi web W around the back side of feed roller 30 within dispenser chassis 10. Then the web W
passes clockwise over the second pinch roller 76 whereafter the web exits through dispenser exit 20 to be readily available externally of the dispenser chassis 10 for an intending user of the toweling material.
To effect positive reciprocation of the cutting blade 40 and thereby project the cutting teeth 44 forming the cutting edge beyond the periphery of feed roller 30 through the aperture means provided in the feed roller periphery by slots 48 to cut the web and thereafter retract the cutting edge as the feed roller rotates, stationary cams al~e mounted on tl)e dispenser chassis 10 adjacent the ends of feed roller 30. These stationary cams in the illustrated embodiment are provided by a cam plate 80 having a cam track 82 formed therein.
As may be seen from Figure 3, the cam plate 80 is disposes within the semi-cylindrical housing 70 disposed in abutment with the end plate 72. It will be understood that a similar cam plate 80 wlth similar cam track 82 formed therein will be disposed at the opposite - ln-end of semi-cylindric~l housi~g 70 ~nd end plate 72 ~t the other end of feed roller 30.
The cam follower 62 disposed in alignment with the guide pin 60 at the upper end of the carrier pl~te 42 for cutting knife 40 is engaged within the cam trAck 82 of cam plate 80. The configuration of the c~m tr~ck 82 may be seen from the broken line showing for the cam track on Figures 1, 2 and 4.
To support the feed roller 30 on its stub shafts 32 within the casing prorided by housing 70 and end plates 72, e~ch cam plate 40 may be provided wlth a sleeve bearing 84 within which the stub shaft 32 is journaled. Such a structure is shown in Figure 3 and it will be understood that a simil~r construction is repeated at the oppo-site end of feed roller 30 ~nd associflted cam plate 80~
A stripper bar 90 is shown in Figure 1 fixed to the front w~ll 22 of dispenser ch~s~is 10. This front wall 22 as previously described may be the front of the cover forming fl p~rt of the dispenser chassis 10, such cover being pivot~lly mounted (not shown) on the back wall 12 of $he dispenser chassis 10. The lower end of the stripper bar 90 which extends along the length of feed roller 30 is disposed closely adjacent the per}pheral surfsce of feed roller 30 immed}~tely in front of the exit pinch roller 76. The stripper bar 90 ~cts to ensure that the web OI creped materi~l is stripped from the high friction surface of the feed roller 30 and properly guided down along exit pinch roller 76 to the dispenser exit 20.
It has been described hereinabove how the web o~ creped mate-rial being unwound from supply roll R is threaded clockwise ~round pinch roller 74, then counterclockwise around the high friction surface of feed roller 30 and then clockwice around exit pinch roller 7~ With web W so threflded and the dispensing and cutting mechanism in the position shown in Figures l, 2 ~nd 3, the cutting edge formed by teeth 44 on cutting blade 40 is retr&cted to lie within the periphery of feed roller 30. The cflm follower 62 at the upper location of pin 60 on carrier plate 42 is engaged in the portion of cam track 82 which is closely adjacent to the axis of feed roller 30 defined by the supporting stub shafts 32. By applying a pulling force on web WE, web material withdrawn from supply roll R passes around lead-in pinch roller 74, thence around the high friction surf~ce of feed roller 30 ~nd finally around the exit pinch roller 76 leaving through dispenser exit 20 to the intending user.
As web material is pulled out of the dispenser, the ~eed roller 30 is caused to rotate resulting in the cam followerq 62 moving counterclockwise as shown in Figures 1-3 around the path oî cam tracks 82. This continued rotation of feed roller 30 moves the cam followers 62 which were disposed at the uppermost position in cam trscks 82 in Figures 1 and 2 until these cam followers have progressed to the lowermost position within cam tracks 82 a9 shown in Figure 4.
During this course of 180 rotfltion of feed roller 30, the cutting edge on knife 40 provided by teeth 44 wlll have progressed from being within lthe periphery of the feed roller 30 to a position where the cutting edge of teeth 44 is fully projected as shown in Figure 4.
During this 180 of rot~tion whlle the cutting edge of teeth 44 is projected through the aligned slots 48 in the periphery of feed roller 30, the web will have been cut subject only to leaving small uncut portions defined by the recesses 46 in kniSe 40 cooperatinE~ with the solid portions 50 which separate the aligned slots 48.
Continued withdrawal of web material will produce further rotation of feed roller 30 with the cam followers 62 commencing to move up within the cam tracks 82 of cam plstes 80 th~reby rapidly retracting the cutting edge of teeth 44 on cutting blade 40 back within the feed roller 30 such that when the aperture means provided by slots 48 reach the tangent line between feed roller 30 and exit pinch rsller 76, the cutting edge teeth 44 of knife 40 will have been f~ly retracted back within the feed roller 30. This fully retracted position for knife 40 will continue as the cam followers 62 trflvel along the remaining path of cam tracks 82 and until the aperture meflns provfded by slots 48 reAch the contact line between feed roller 30 and pinch roller 74, this position being shown for knife 40 on Figures 1 and 2.
At this stage the intending user msy readily separate the three small uncut portions left by reces~es 46 in knife 40 thereby being made available a predetermined length of creped material. At the same time, A free length of web end WE will remain available, disposed beneath the dispenser exi$ 20 in readiness for the next intended use of towel material. Of course, the above described proce-dure in operating the dispensing and cutting mechanism may be repefltedly carried out thereafter, continued to the extent of toweling desired by intending users.
It should be noted that due to the laterally offset location of the cutting blade 40 reletive to a radius of feed roller 30, the cutting edge OI the blade emerges from the interior of the feed roller in the direction of feed roller rotation. The friction coated surface of the feed roller behind the blade cutting edge holds the creped web mate-rial thus minimizing stretch in the towel paper as the knife penetrates the web, thereby permitting positive cutoff of the web with a mini~ium travel of the cutting blade.
The foregoing sets forth a deWled description of the rolled material dispenser and cutting mechanism of the inventlon. It is to be recognized that various modifications of the dispenser and cutting mechanism of this in~rention will become apparent to those skilled in the art. Therefore, the scope of the invention is to be limited solely by the scope of the appended claims.
FEED ROLLER CONTAINING A SLIDING currER
This invention relates to rolled material dispensers and, more specifically, to a flexible sheet material dispenser such as usable for dispensing paper towels with a cutter mechanism housed within the feed roller of the dispenser adapted to cut a web of flexible sheet matePial into individual lengths of the material.
Dispensers for rolled flexible sheet material, sueh as paper toweling, are well known, a great many of such dispensers including mechanisms for perforating or severing a web of the m~terial to di~ride the web into individual sheets. The perforating or severing mechanism used in a number of these dispensers has included a rotatably mounted knife and a cooperating rotstably mounted roller having A slot therein for receiving the radially outermost portion of the knife as the knife rotates past the roller. A web of flexible sheet material is passed between the roller and the knife to be perforated or severed when the radially outward knife portion enters the slot in the roller.
Such mecbanisms are satisfactory for perforating or severing relatively unstretchable flexible sheet mflterials, such as uncreped paper toweling. However, with the incre&sed use of relatively stretchable flexible sheet materials, such as embossed or creped paper toweling, the prior art perforating and severing mechanisms have proved unsatisfactory because the web of sheet material tends to stretch about the cutting edge of the knife instead of being effectively perf~
reted or severed thereby.
Although precision rctary shears are known which could be employed to overcome this problem, such shears are much too expensive to be used in nexible sheet material dispensers designed for installatiorl to be used in both commercial and private washrooms.
Vsrious devices for cutting off sheets of creped web material have been proposed. One is exemplified in DeLuca Patent 4,188,~44 issued Febru~ry 19~ 198û, wherein ~ toothed kni~e is pivotally mounted internally of the feed roller within the towel dispenser. However, the towel cut produced by these internal pivoted toothed knives produces a wavy shape due to the pivoting action which the toothed knife undergoes. The points and roots of the straight knife teeth do not emerge from the feed roller on a straight line. Where the cutting knife is mounted to be movable radially outwardly from within a roller over which a web of paper is passing, thi~ radially movable cutting knife unduly stretches the paper away from the feed roller without properly cutting the web.
In dispensers for crepe paper toweling where the cutting mechanism is intended to be actuated solely by pulling on the paper web, usually with the web hands of the intending user, it is important that the required pulling force be minimized to prevent the web from tearing prematurely in the intending user's fingers. To minimize the tearing effort, the cut must be as short as possible and hence must be 90 to the length of the web of sheet material and without a wave form at the location of the web cut. In dealing with crepe paper toweling, the cutting mechanism must also be designed such that the cutffng mechanism will effectively cut the paper with a minimum of paper movement and not significantly stretch the creped paper.
SUMMARY OF THE INVENTION
The rolled material dispenser of this invention is designed to dispense predetermined lengths of creped paper from a supply roll of toweling material employing a cutting mechanism operable solely by pulling on the free end of the paper web exposed at the dispenser ~-?~:~4~
exit. The web Is cut into predetermined lengths with the cut being mflde at 90 to the length of the towel web, the cut being free of wAves and the cut being made with ~ minimum of pulllng effort required to be applied to the free web end.
The rolled material dispenser of this invention overcomes the objections discussed above with rererence to prior art proposals in dispensing crepe paper towellng by using a str~ight ~liding knife mounted inside a ~eed roller having a high rriction exterior surface.
The mountlng ~or the slidable cutting blade assures movement of the blade in a path p~r~llel to and of~set ~rom a rsdiu~ of the feed roller. Sliding the knife blade in and out o~ the feed roller along the same plane as the plane of the knife teeth serves to assure the com-pletion of a perfectly straight cut. By having the plane Or the knife offset i'rom a radius of the feed roller, the cutting blade emerges with the knife moving forw~rd in the ssme direction ss the rothtion of the feed roller to allow the blade teeth to penetrate the towel web without unduly stretching it awQy rom the feed roller.
Reciprocating movements are impsrted to the cutting blade as the feed roller is rotated by drawing on the web of m~terisl exposed at the dispenser eldt by providing cam ~ollowers movable with the blade. These csm follower~ extend beyond the ends Or the feed roller and are dispo~ed to reciprocste along the r~diu~ of the feed roller from which the cutting blade is laterally offset. St~tionary cams are mounted adjacent the ends of the feed roller engaged with the cam follower~ respectively, to positively project the blade cutting edge beyond the feed roller periphery to cut the web and positively retract such edge as the feed roller is rotated by drawing on the web at the dispenser exit.
With the foregoing in mind, it is an object of an aspect of the present invention tion to provide a flexible sheet materisl dispenser well suited to the handling of creped paper toweling wherein the mechanism for effectively cuttlng the toweling web m~kes a straight cut perpendicular ~tj~
to the length or the web while cuttirlg the web into predetermined lengths as needed for intending towel users.
It ls an o~Ject of ~n aspeot of the lnvertlon to ~rovld~ a dlspense~
including a cutting blflde slidably mounted within the di~penser feed roller wherein the cuttlng edge of the blade i9 projected outwardly beyond the periphery or the reed roller along ~ path p~rallel to ~nd offset from a radius of the ~eed roller to cut the web as it passes over the feed roller.
It is an cbject of an asp~ct of the invention to provide a flexible sheet msterlsl dispenser wberein a cuttlng blade i~ slidably mounted within a ~eed roller and stationary cam~ external or the feed roller operste to positively project and retract the cutting blade incident rotation of the feed roller a~ the towel web i9 withdrawn from the dispenset esit by an intending user.
It is an object of an aspect of the invertion to pr~vide a r o 1 1 e d material dispenser for e~f0ctiYely making a straight cut perpendicular to the web of material being withdrawn from the dispenser which is compact, rugged and economical to manu~acture and ideally suited for both commercial and private installations.
- 4a-An aspect of the invention is as follows:
A dispenser for rolts of flexible sheet materlal comprising:
a chasqi3 adapted to be attached to 8 wall;
means carried by said chsssis îor rotatably supporting a roll of flexible sheet materi~l;
a feed roller rotatably mounted on ~aid chassis for guiding a web of sheet material ~rom the roll to 8 position to be grasped by a user so that the user may pull the web out Or the dispenser, said feed roller hhving aperture means rormed longitudin~lly in the periphery thereo~;
carrler means within said ~eed roller h~ving a cutting blsde mounted thereon and cam ~ollowers extending beyond the opposite ends oi~ s&id feed roller9 ssid blade havlng a cutting edge;
means mounting said carrier mesns in said feed roller for movement o~ said cutting blade in a Qath parallel to and lAterally o~f-set from a radiu~ of said ~eed roller; and stationary cams mounted on said chassiq adjacent the ends o~ said ~eed roller, respectively, ~aid cam followers being engaged with said stationary cams to positi~ely move said blade in said path pro~sc-ting gsid cutting edge beyond said feed roller periphery through said aperture mean~ to cut the web and retracting said edge as said feed roller rotate~.
The foregoing object~ o- the invention will become apparent upon consideration o~ the detailed description o~ a preferred embodiment of the invention in connectlon with the accompanying dra~ings.
~ igure 1 is a side elevstional, ~riew with portions in section, of the rolled msterial dispenser of this in-~rention displaying the feed roller containing a sliding cutter.
Figure 2 is an en;arged sectional view o~ the feed roller containing ths sliding cutter with a portion of the ~eed roller broken ~wsy.
Flgure 3 Is a sectional view taken on line 3-3 o~ Figure 2.
Figure ~ is a view similar to Figure 2 but show}ng the feed roller and sliding cutter rotated to a dif~erent operated condition.
Figure 5 is a side elevational view of the feed roller showing the longitudinal aperture means.
Figure 6 is ~n elevntion~l view of the cutting blflde for the feed roller interior.
DESCRIPTION OF THE PREFERRED EMBODIMENT
Referring to Fig~re 1 on the drawings, the general outline of a fairly conventional dispenser cabinet chassis 10 is illustrated. The dispenser chassis 10 has a back wall 12 which will be provided with appropriate openings (not shown) to accom modate fasteners for att~ching the chassis 10 of the dispenser to a wall.
A msin supply roll R of fle~tible sheet material, such as paper toweling, may be suitably supported on a yoke 14 having its legs pivotally connected to clips 16 tixedly secured to the back wall 12 of dispenser chassis 10. The legs of yoke 14 each carry a cup 18 at their free ends, these oppositely facing cups 18 entering into the opp~
site ends of the core of supply roll R such that roll R rests against the back wall 12, moving downwardly as towel material is withdrawn from the roll. This mounting for a supply roll R within a dispenser chassis 10 is fairly conventional in the rolled material dispenser art and ~urther discussion of such structure should be unnecessary.
Further, generally well known features for the dispenser chassis 10 may include the front portion consisting a cAbinet cover pivoted to the back wall la o~ chassis 10 to enable this cover to be opened for successive reloading of fresh rolls R onto yoke 14 in the chassis 10. An opening 20 at the lower front portion OI chassis 10 provides the dispenser exit as by the front wall 22 of the cover of chassis 10 terminating above the bottom wall 2~ of chassis 10.
The web W of flexib~e sheet material witbdrawn off supply roll R is threaded into the dispensing and cutting mechanism mounted within the chassis 10 which may now be described in detail.
Referring to Figures 1-4, a feed roller 30 is rotataMy mounted on stub shafts 32 extending axislly outwardly from the opposite ends of feed roller 30. Each stub sheft 32 has one end thereof fixedly securing a central bore 34 in the hub 36 of feed roller 30, this structure being best seen in Figure 3.
The outer end ~f one of the stub shafts 32 may be provided with the conventional hand ~Nheel (not shown) fixedly secured thereto9 this hand wheel enabling manual rotation of the feed roller 30 from a point externally of the dispenser chassis 10 should such manual rotation of feed roller 30 be necessary as in threading the web W of flexible sheet material from supply roll R through the dispensing and cutting mechanism to the dispenser exit 20.
Each of the feed roller hubs 36 is formed with a pair of slots 38 aligned along a diameter of the feed roller. These pairs of slots in the hubs 36 at the opposite ends of the feed roller 30 form part of the mounting means for the carrier supporting the cutter blade as will be described subsequently.
A carrier for cutting blade 40 is provided by a pair of plates 42. One plate 42 is fixedly mounted on each end of the cutting blsde 40 with these plates 42 being perpendicular to the length of blade 4n.
As may be best seen in Figure 6, the blade 40 with the carrier provided by plates 42 at the opposite ends of the blade 40 is formed with a series of teeth 44 spaced along the length of blade 40. In the specific embodiment illustrated, four pairs of teeth ~4 are provided along the length of blade 40 with these pairs of teeth 44 being separated by recesses 46.
As will be seen from Figure 5, the periphery of feed roller 30 is provided with aperture means consisting of a series of longitudinally aligned slots 48, four such slots being shown in the illustrated embodiment on Figure 5 with these slots being separated by continuous surface portions 50 which are part of the peripheral surface of feed roller 30.
In the mounting of cutting blade 40 within feed roller 30 as will be more apparent hereinafter, the p~irs of teeth 44 on blade 40 separated by recesses 46 are projected outwardly through the four aligned slots 48 of feed roller 30 while the solid portions 50 of the feed roller periphery pass down into the three recesses 46. By uti-lizing this form of cuttlng Made 40 wlth the perticulclr ~perture me~ns provided by slots 48 in the periphery of feed roller 30, the cutting action performed on the web OI flexible sheet material passing o~rer the feed roller 30 produces A straight line cut parallel with the axis of feed roller 30 but leaving three small uncut portions in the web corresponding to the width of recesses 48 and length of solid portions 50 on the periphery of feed roller 30.
By leaving these minor uncut portions of the web W, spaced across the width of the web, the continuity of web W is maintained while the web has been substantially cut but is still within the confines of the dispenser chassis 10 before reaching the dispenser exit 20. Once the web is pulled further from the dispenser chassis 10 by the intending user of the now defined sheet length, a minor degree of pulling force applied by the intending user will easily separate the spaced uncut portions left by the configuration of cutting blade 40 and spaced slots 48 in feed roller periphery 30 with the intending user effectively obtaining the apprQpriate length of toweling.
Each of the carrier plates 42 fixedly mounted on the opposite ends of cutting blade 40 is provided with a pair of guide pins 60 extending normal to the plane of plate 42. These pins ~0 are spaced on each plate 4a to be positioned to guidingly engage with the aligned slots 38 formed in each hub 36 at the ends of feed roller 30. With this mounting means for the carrier plates 4a fixed to the ends of elongated cutting blade 40, the cutting blade 40 is reciprocable in a path which is parallel to and laterally offset from a radius of the feed roller, this rsdius corresponding to the axis of the aligned slots 38 which extend along a diameter of feed roller 30. Thus, not only does the mounting means enable movement of the cutting blade in R path parallel to and laterfllly offset from this radius of feed roller 30 but also the mounting means provides for reciprocation of the guide pins 60 along this same radius of the feed roller 30.
One of the guide pins on each of the carrier plates 42 at the ends of cutting blade 40 is pro~ided with a cflm ~ollower 62. This cam follower 62 at each end of feed roller 30 extends outwardly beyond the ends of feed roller 30 as m&y be best seen on Figure 3.
Thus, while the guide pins 60 on each cArrier plate 42 are basicAlly enclosed within the pair of aligned slots 38 in the hub 3~ at each end of roller 30, the cam follower 62 extends outwardly beyond the ~eed roller end to engage with a stationary cam mounted on the dispenser chassis as will be described subsequently.
Within the lower forward portion of dispenser chassis 10, immediately adjacent the dispenser exit ao, there is provided a suitable casing to house the feed roller and other components making up the dispensing and cutting mechanism. The location of this casing within the dispenser chflssis 10 is shown in Figure 1 while its components may generally be seen In the sectional view of Fi~ure 3.
The casing includes a semi-cylindrical housing 70 having an inter-nal diameter somewhQt lsrger than the diameter of feed roller 30.
Housing 70 extends from the point where the web W of flexible sheet material entets the dispensing and cutting mechanism, terminating adja-cent the dispenser exit 20. The housing 70 extends across the width of the dispenser chassis 10 between the sides of the pivotally mounted cover of dispenser chassis 10. Housing 70 may have its ends closed by end plates 72, one such plate being disposed at each end of housing 70 with the plate 72 appropriately secured to the end of housing 70 in the relation flS shown in secffon on Figure 3.
Within the casing made up by semi-cylindrical housing 70 and the two end plates 72 closing the ends of such housing, there is pro-vided a lead-in pinch roller 74. Preferably, this pinch roller is mounted on fl shaft and is biased by spring means (not shown) against the peripheral surface of feed roller 30. A second pinch roller 76 is mounted, similar to the mounting for pinch roller 74, with pinch roller 76 being disposed im mediately adjacent the dispenser exit 20.
Thus, pinch l-oller 76 will be spring billsed by me~ns (not shown) against the peripheral surface of feed roller 30 similar to pinch roller 74~
The path of the web W of flexible sheet material coming from supply roll R as it moves through the dispensing and cutting mechanism mey now be described. After leaving roll R carried on pivotally supported yoke 14 the web W initially passes clockwise around the pinch roller 74 as viewed on Figures 1, 2 and 4. Web W then proceeds counterclockwise around the high friction peripheral surface of feed roller 30. The presence of semi-cylindrical housing 70 which gen-erally concentrically encloses feed roller 30 serves to guide and thereby assist in threading the leading end oi web W around the back side of feed roller 30 within dispenser chassis 10. Then the web W
passes clockwise over the second pinch roller 76 whereafter the web exits through dispenser exit 20 to be readily available externally of the dispenser chassis 10 for an intending user of the toweling material.
To effect positive reciprocation of the cutting blade 40 and thereby project the cutting teeth 44 forming the cutting edge beyond the periphery of feed roller 30 through the aperture means provided in the feed roller periphery by slots 48 to cut the web and thereafter retract the cutting edge as the feed roller rotates, stationary cams al~e mounted on tl)e dispenser chassis 10 adjacent the ends of feed roller 30. These stationary cams in the illustrated embodiment are provided by a cam plate 80 having a cam track 82 formed therein.
As may be seen from Figure 3, the cam plate 80 is disposes within the semi-cylindrical housing 70 disposed in abutment with the end plate 72. It will be understood that a similar cam plate 80 wlth similar cam track 82 formed therein will be disposed at the opposite - ln-end of semi-cylindric~l housi~g 70 ~nd end plate 72 ~t the other end of feed roller 30.
The cam follower 62 disposed in alignment with the guide pin 60 at the upper end of the carrier pl~te 42 for cutting knife 40 is engaged within the cam trAck 82 of cam plate 80. The configuration of the c~m tr~ck 82 may be seen from the broken line showing for the cam track on Figures 1, 2 and 4.
To support the feed roller 30 on its stub shafts 32 within the casing prorided by housing 70 and end plates 72, e~ch cam plate 40 may be provided wlth a sleeve bearing 84 within which the stub shaft 32 is journaled. Such a structure is shown in Figure 3 and it will be understood that a simil~r construction is repeated at the oppo-site end of feed roller 30 ~nd associflted cam plate 80~
A stripper bar 90 is shown in Figure 1 fixed to the front w~ll 22 of dispenser ch~s~is 10. This front wall 22 as previously described may be the front of the cover forming fl p~rt of the dispenser chassis 10, such cover being pivot~lly mounted (not shown) on the back wall 12 of $he dispenser chassis 10. The lower end of the stripper bar 90 which extends along the length of feed roller 30 is disposed closely adjacent the per}pheral surfsce of feed roller 30 immed}~tely in front of the exit pinch roller 76. The stripper bar 90 ~cts to ensure that the web OI creped materi~l is stripped from the high friction surface of the feed roller 30 and properly guided down along exit pinch roller 76 to the dispenser exit 20.
It has been described hereinabove how the web o~ creped mate-rial being unwound from supply roll R is threaded clockwise ~round pinch roller 74, then counterclockwise around the high friction surface of feed roller 30 and then clockwice around exit pinch roller 7~ With web W so threflded and the dispensing and cutting mechanism in the position shown in Figures l, 2 ~nd 3, the cutting edge formed by teeth 44 on cutting blade 40 is retr&cted to lie within the periphery of feed roller 30. The cflm follower 62 at the upper location of pin 60 on carrier plate 42 is engaged in the portion of cam track 82 which is closely adjacent to the axis of feed roller 30 defined by the supporting stub shafts 32. By applying a pulling force on web WE, web material withdrawn from supply roll R passes around lead-in pinch roller 74, thence around the high friction surf~ce of feed roller 30 ~nd finally around the exit pinch roller 76 leaving through dispenser exit 20 to the intending user.
As web material is pulled out of the dispenser, the ~eed roller 30 is caused to rotate resulting in the cam followerq 62 moving counterclockwise as shown in Figures 1-3 around the path oî cam tracks 82. This continued rotation of feed roller 30 moves the cam followers 62 which were disposed at the uppermost position in cam trscks 82 in Figures 1 and 2 until these cam followers have progressed to the lowermost position within cam tracks 82 a9 shown in Figure 4.
During this course of 180 rotfltion of feed roller 30, the cutting edge on knife 40 provided by teeth 44 wlll have progressed from being within lthe periphery of the feed roller 30 to a position where the cutting edge of teeth 44 is fully projected as shown in Figure 4.
During this 180 of rot~tion whlle the cutting edge of teeth 44 is projected through the aligned slots 48 in the periphery of feed roller 30, the web will have been cut subject only to leaving small uncut portions defined by the recesses 46 in kniSe 40 cooperatinE~ with the solid portions 50 which separate the aligned slots 48.
Continued withdrawal of web material will produce further rotation of feed roller 30 with the cam followers 62 commencing to move up within the cam tracks 82 of cam plstes 80 th~reby rapidly retracting the cutting edge of teeth 44 on cutting blade 40 back within the feed roller 30 such that when the aperture means provided by slots 48 reach the tangent line between feed roller 30 and exit pinch rsller 76, the cutting edge teeth 44 of knife 40 will have been f~ly retracted back within the feed roller 30. This fully retracted position for knife 40 will continue as the cam followers 62 trflvel along the remaining path of cam tracks 82 and until the aperture meflns provfded by slots 48 reAch the contact line between feed roller 30 and pinch roller 74, this position being shown for knife 40 on Figures 1 and 2.
At this stage the intending user msy readily separate the three small uncut portions left by reces~es 46 in knife 40 thereby being made available a predetermined length of creped material. At the same time, A free length of web end WE will remain available, disposed beneath the dispenser exi$ 20 in readiness for the next intended use of towel material. Of course, the above described proce-dure in operating the dispensing and cutting mechanism may be repefltedly carried out thereafter, continued to the extent of toweling desired by intending users.
It should be noted that due to the laterally offset location of the cutting blade 40 reletive to a radius of feed roller 30, the cutting edge OI the blade emerges from the interior of the feed roller in the direction of feed roller rotation. The friction coated surface of the feed roller behind the blade cutting edge holds the creped web mate-rial thus minimizing stretch in the towel paper as the knife penetrates the web, thereby permitting positive cutoff of the web with a mini~ium travel of the cutting blade.
The foregoing sets forth a deWled description of the rolled material dispenser and cutting mechanism of the inventlon. It is to be recognized that various modifications of the dispenser and cutting mechanism of this in~rention will become apparent to those skilled in the art. Therefore, the scope of the invention is to be limited solely by the scope of the appended claims.
Claims (5)
1. A dispenser for rolls of flexible sheet material comprising:
a chassis adapted to be attached to a wall;
means carried by said chassis for rotatably supporting a roll of flexible sheet material;
a feed roller rotatably mounted on said chassis for guiding A web of sheet material from the roll to a position to be grasped by a user so that the user may pull the web out of the dispenser, said feed roller having aperture means formed longitudinally in the periphery thereof;
carrier means within said feed roller having a cutting blade mounted thereon and cam followers extending beyond the opposite ends of said feed roller, said blade having a cutting edge;
means mounting said carrier means in said feed roller for movement of said cutting blade in a path parallel to and laterally off-set from a radius of said feed roller; and stationary cams mounted on said chassis adjacent the ends of said feed roller, respectively, said cam followers being engaged with said stationary cams to positively move said blade in said path projec-ting said cutting edge beyond said feed roller periphery through said aperture means to cut the web and retracting said edge as said feed roller rotates.
a chassis adapted to be attached to a wall;
means carried by said chassis for rotatably supporting a roll of flexible sheet material;
a feed roller rotatably mounted on said chassis for guiding A web of sheet material from the roll to a position to be grasped by a user so that the user may pull the web out of the dispenser, said feed roller having aperture means formed longitudinally in the periphery thereof;
carrier means within said feed roller having a cutting blade mounted thereon and cam followers extending beyond the opposite ends of said feed roller, said blade having a cutting edge;
means mounting said carrier means in said feed roller for movement of said cutting blade in a path parallel to and laterally off-set from a radius of said feed roller; and stationary cams mounted on said chassis adjacent the ends of said feed roller, respectively, said cam followers being engaged with said stationary cams to positively move said blade in said path projec-ting said cutting edge beyond said feed roller periphery through said aperture means to cut the web and retracting said edge as said feed roller rotates.
2. A dispenser as recited in claim 1 wherein said carrier means includes a pair of plates, one said plate being fixedly mounted on each end of said cutting blade perpendicular to the length of said blade, and said mounting means supports said carrier means by means of said plates.
3. A dispenser as recited in claim 2 wherein said mounting means includes a pair of slots aligned along a diameter of said feed roller at each end of said roller, said slots being aligned with said radius, and each of said plates is provided with a pair of guide pins extending normal to the plane of the plate with the pair of pins on each plate being guidingly engaged with the aligned slots in one end of said feed roller.
4. A dispenser as recited in any one or claims 1 or 2 wherein said mounting means provides for reciprocation of said cam followers along said radius of said feed roller.
5. A dispenser as recited in claim 4 wherein said mounting means includes guide means cooperating with said carrier means and the ends of said feed roller to constrain reciprocating movements of said carrier means to the direction of said radius.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/788,837 US4712461A (en) | 1985-10-18 | 1985-10-18 | Rolled material dispenser with feed roller containing a sliding cutter |
| US788,837 | 1985-10-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1262446A true CA1262446A (en) | 1989-10-24 |
Family
ID=25145724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000520668A Expired CA1262446A (en) | 1985-10-18 | 1986-10-16 | Rolled material dispenser with feed roller containing a sliding cutter |
Country Status (17)
| Country | Link |
|---|---|
| US (1) | US4712461A (en) |
| EP (1) | EP0219732B1 (en) |
| JP (1) | JPS63501553A (en) |
| KR (1) | KR870700476A (en) |
| AU (1) | AU6474386A (en) |
| BR (1) | BR8606934A (en) |
| CA (1) | CA1262446A (en) |
| CH (1) | CH676569A5 (en) |
| DE (2) | DE3690545C2 (en) |
| DK (1) | DK165813C (en) |
| FI (1) | FI84985C (en) |
| GB (1) | GB2191171B (en) |
| IE (1) | IE59520B1 (en) |
| NL (1) | NL191311C (en) |
| NO (1) | NO168632C (en) |
| SE (1) | SE458336B (en) |
| WO (1) | WO1987002294A1 (en) |
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-
1985
- 1985-10-18 US US06/788,837 patent/US4712461A/en not_active Expired - Lifetime
-
1986
- 1986-09-12 CH CH2402/87A patent/CH676569A5/de not_active IP Right Cessation
- 1986-09-12 WO PCT/US1986/001871 patent/WO1987002294A1/en active IP Right Grant
- 1986-09-12 JP JP61505495A patent/JPS63501553A/en active Granted
- 1986-09-12 NL NL8620410A patent/NL191311C/en not_active IP Right Cessation
- 1986-09-12 DE DE19863690545 patent/DE3690545C2/en not_active Expired - Lifetime
- 1986-09-12 AU AU64743/86A patent/AU6474386A/en not_active Abandoned
- 1986-09-12 BR BR8606934A patent/BR8606934A/en unknown
- 1986-09-12 DE DE19863690545 patent/DE3690545T1/de active Pending
- 1986-09-12 GB GB08713142A patent/GB2191171B/en not_active Expired
- 1986-10-01 EP EP86113515A patent/EP0219732B1/en not_active Expired - Lifetime
- 1986-10-13 IE IE269686A patent/IE59520B1/en not_active IP Right Cessation
- 1986-10-16 CA CA000520668A patent/CA1262446A/en not_active Expired
-
1987
- 1987-06-16 SE SE8702519A patent/SE458336B/en not_active IP Right Cessation
- 1987-06-17 DK DK308087A patent/DK165813C/en not_active IP Right Cessation
- 1987-06-17 FI FI872712A patent/FI84985C/en not_active IP Right Cessation
- 1987-06-17 NO NO872529A patent/NO168632C/en not_active IP Right Cessation
- 1987-06-18 KR KR870700525A patent/KR870700476A/en not_active Ceased
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