US2670041A - Tape-dispensing mechanism with knife-guarding means - Google Patents

Description

Feb. 23, 1954 A. P. KRUEGER TAPE-DISPENSING MECHANISM WITH KNIFE GUARDING MEANS Filed March 11, 1949 5 She ets-Sheet 1 ATTORNEYS Feb. 23, 1954 p KRUEGER 2,670,041

TAPEDISPENSING MECHANISM WITH KNIFE GUARDING MEANS Filed March ll, l949 3 Sheets-Sheet 2 ATTORN EY5 Feb. 23, 1954 KRUEGER 2,670,041

TAPE.DISPENSING MECHANISM WITH KNIFE GUARDING MEANS 5 Sheets-Sheet IS Filed March 11, 1949 Patented Feb. 23, 1954 STATES OFFICE TKPE DISPENSING MECHANISMWITH GUARDING MEANS" Alfred; LP; Kruegcr; Stratfomdgflonn, 'assignor to Derby Sealers; Incorporated, Derby, Conn 21- conporatiom of. Connecticut ApplicationMarcli I1, 194stseria1 No; 8038 1? 13 Glaims; (Cl. MAJ-8.4.5)

This. inventiom relates to tapeedispensin'gz chines" amigo more particularly; to: a; device; for:

dispensingzpnessuressensitiwetape; WhiClIiS tacky orrclingazblci-uporraone side.v

AtIi-the:=przesent-; timez thenezare'. manw differentkinds of pressureesensitivatape; some" of i which are: oil suelm at. character: that: they are readily SBVBIEGE ontornxoff agains'twteareoffrblade, while othersanesnelativelyzstrormgs anditough andi'requiize theeuse: oiii an'sharps: bladev that they may be severednasily'rand-zcleanlyw As a matter of fact imthecdevices-of the:present. application: arazor: blad evisiieirminwediasithe:zteama off element 5 against which nmvedi'totbev-severect. so that-a veryvslmarrr' severing'edgcfisprovided. It is: al.- wmyssdesiraltle to: shieidc-onrgnardithe' edgeof the: tearoff blane-s-so: thatzthe zfingerszof; the operator.

OfithkldEXl-RB willxnoticomeitinxcontact witlm it;

and th s is particularly desirable where avery" sharp hiade isnemplcyedg: on sthe-usermigh-t rreceive a; severezcutz It: is: contemplated: a by the present invention torpmvideaaignard or shieldzwhichwilt effectively: gnamdcthecuttingazedgetsof ther-tear-offi blade; but: whichrguardzwill he nmw-editoan inoperative pos-i-p tionmvhenthetape isdlzawn: toward the: hiade r50. asltozexpose? the latter for contacttwith the taper; ASltaEB ofi'zthis cha racter has a" tendency toclingtbMEhBstEa'IIi-Off: blade; it is-desirahla to: provide a:

stripper-torstripgthe:tape from; the bladeso that therewvilliba atzfree proiectingqendu to bergrasped bsotliezfingersmfithe user. In thepresenttdevice thekgnandiontheteareofi blade is mountedluponl openatedu by: the; stripper member which is arranged? 110'. contact the nonetackyside of lthe tapeythecparts being-so constructed- .that when the tape is moved-. toward-ithetear-oftloladeioa: severance; the .zstripper 'member will he; engaged by the :none-tackyv-sidetof: the-=tape and will also beimovedt Thjsmovement of the stripper memhcr'zwill effect a retiring-movement of the guard. toexposewthesha-rp'e'dge of thetear off bladeand',

after: the'tape? has been: severed, the stripper.

member: will; strip: theileadingwend; of thetapev f rnm theiblade'anct move: it to-a position in which thereawilltbe atfreerproj ecting' end-tube grasped byrthe: operatori Specifically, in the-present construction vthe gnandtoii shield,fortthetearmfi bladei's-.-.n:1onntedditectly uppn: apart: of the; stripper. memben so.

asqto beemoved' therebyand tthisiguardtisl properly guided in its movements.- so: that, whileit will: not

actually-contact the sharpzedgeot. the. blade and.

therefone ,w-ill -notudullithe latter it-willmoveim fnonttofithe :blade pnevent'contact fingers of the user therewith.

fine objec-taofthe present-invention is-to provide ans. intcprovedi machine: for dispensing;v pressures--- sensitive tapel Afurther object oithcinventionisto provide-w machine for dispensing pressure sensitive tape hav ing.; :a-lsevering bladerand at guard normally shielding-said blade aga-inst contact by thehand-1 of" the user;

Still another objeet of the invention is: topro tide-:a new-and improved machinefor dispens ng-:-

pressu're-sensitive tape, which machineisprovided with atfixed tear-off blade for the tape: and atmovable guardorshieldfor the: blade, whichmember: is carried.- by a str pping device. tostrip the tape: f-romtthe severingblade Fig Elisa detaillperspective view. of the stripper member" and k niie guard;

Eigm 6ii's aperspective view of the reel for sup.- portingthe. supply roll t Fig.1 isairagmentary-sectional view on line 1-'Iiof1 .-i'gt I;

Fighliisi al-viewr similar to Fig. '7 showingga. sl'i'ght'lymodified" form of; my; device;

Eig,..9;i's an-view similar touFig... 8" showing, a further modification; and

Eig.,10 isia. fragmentary sectionalview on Iine' llTl lit ofiFig.. 9

To -.il1'ustrate av preferred embodiment of? my. irlventiomlhave shown a tape-dispensing devicecomprising a supporting base- I Oftom which rises" astandardl l. A cas ng? is supported-on the standardl ill by; means of This. rod'istlireaded; into a boss I lofthe" casing" 41; passes l'ooselyi. through" the standard H and" receives. oriitszprojecting, end a clamping" nut 'l 5- so tli'atlthe case ma-y be clamped in easel 2.51s openr'at" one side and is provided: with As'" shown more especiallynn Fig? a second the threadedrod f3.

adjusted" rotatafile. position relativelyto th'e standard. The" rod or pin I7 is threaded into the boss I4, and rotatably mounted on this pin is a reel for holding the supply roll of tape ll, this reel comprising in this instance a disk 13 and a hub It. This reel may be held in place by a spring 29 disposed in a recess 2! in the hub I9, the spring being held under compression by the nut 22 threaded on the pin ii, and thus applying friction to the reel to resist rotation thereof and prevent backlash at the end of a dispensing operation.

The hub I 9 is received in the opening in the spool 24 (Fig. 1) which holds the supply roll of tape, and is designed to fit snugly within this spool. However, the fit is sometimes sufiiciently loose so that, as the tape is pulled from the roll and the latter rotated thereby, there will be some tendency for the supply roll of tape to turn relatively to the hub 19 and, in that event, the spool is apt to work off the hub, that is, to gradually move in a direction away from the disk I 8 so that it may not be properly aligned with the mechanism of the dispenser. It will be noted, particularly from Figs. 3 and 6, that the hub or core I9 is knurled on its peripheral surface, as at 25, these knurlings being disposed spirally and given a lead in the proper direction so that if there is any rotation between the spool 24 and the core or hub [9, the spool will tend to move toward the disk 8. In other words, any rotation of the spool on the hub will cause the spool to screw onto the core instead of screwing oiT of the core. This maintains the supply spool against the disk l8 and, therefore, in proper alignment with the rest of the mechanism regardless of whether there is a loose or tight fit of the spool upon the hub.

The front wall of thecase I2 is provided with an opening 21 through which the free end 28 of the tape is adapted to be pulled, and, adjacent the lower end of this opening, is mounted a roller 29 adapted to engage the tacky side of the tape so that a free end will protrude from the case to be grasped by the operator, as shown in Fig. 1.

Mounted adjacent the opening 2'! and adapted to engage the non-tacky side of the tape is a stripper member comprising a plate 30 pivoted to the case at 3! and normally urged in a counter-clockwise direction, a shown in Fig. 1, by the spring 32. The movement of the stripper member may be limited by an arcuate slot 33 therein, which slot receives a pin 34 fixed to the case. Formed integrally with the plate-like member 35 and extending laterally at the upper edge thereof is a member 35 having at its forward ends depending ears 33 in which is rotatably mounted a stripping roller 31 adapted to engage the non-tacky side of the tape, the normal position of this roller when the parts are at rest being shown in Fig. 1.

Secured on the case at the upper edge of the opening 21, is a tear-01f blade 39 having a sharp front edge 40 projecting over the opening 21 so as to be in position to contact the non-tacky side of the tape after it has been drawn from the roll. This blade may be held in position by a clamping plate 4|, which clamping plate may, as shown in Fig. 4, be provided with forwardly projecting ears 42, one disposed at each side of the sharpened edge 40 of the blade 39, so as to shield the side edges of the blade. The edge of the blade, as will be noted, projects forwardly from the plate 4| between these ears so that the tape may be drawn over the sharp edge. Hinged to the laterally projecting member 35 of the stripper at the rear end thereof is a guard member 44. This guard member is of plate-like form and is curved upwardly at its forward end as shown at 45 so that in its normal position of rest shown in Figs. 1 and 7, it projects upwardly and forwardly of the sharp edge of the blade between the ears 42, effectively shielding the blade against contact by the fingers. The hinge connection between this member and the member 35, as illustrated, comprises U-shaped projecting ears 46 at each side of the member 44, which ears embrace fingers 41 at the rear edge of the plate 35.

The intermediate portion of the guard member 44 is disposed between upper and lower pins 48 and 49, the pins being spaced to form between them a slot to receive the guard member and to act as guide for the guard member when it is moved from an operative to an inoperative or retracted position by movement of the stripper part 35. It will be seen from Fig. 1, for example, that the lower pin 49 supports the guard member in the position shown and if the same were not present the guard member would drop downwardly upon the part 35 of the stripper and expose the edge of the knife.

The normal or rest position of the parts of the device is shown in Figs. land 7. It will be noted that the tape projects between the rollers 29 and 31 so that a free end is presented to be grasped by the operator. While the roller 3! may not be in contact with the upper or non-tacky surface of the tape it will preferably be sufficiently close to the roller 29 in this position so that when the tape is stripped from the, severing blade, as-

will be hereinafter explained, it will be urged downwardly into contact with the roller 29 so that this free end will always be presented to the user.

In using the machine, the operator grasps the free end 28 of the tape and draws it from the roll. When a suiiicient quantity of tape has been unwound, the tape is moved upwardly toward the severing edge 40. This movement, through contact of the roller 31 with the surface of the tape, eifects movement of the stripper member from the position of Fig. l to that shown in Fig. 3. Due to the hinged connection of the guard 44 with the stripper member, the rear end of the guard member is likewise moved rearwardly and upwardly, thus causing the guard member to move from its operative position, shown in Fig. l, to a retracted or inoperative position, shown in Fig. 3. It will be seen that.

in this position of the parts, as shown in Fig.3, the tape may be drawn over the sharp edge 40 of the severing blade and severed.

Thereafter, the spring 32 will return the stripper member from the position shown in Fig. 3 to that shown in Fig. l, and, likewise, the guard member will again be moved forwardly by the movement of the stripper. The movement of the guard member will be guided by the pins 48 and 49 so that it will be moved to a position in front of the sharp edge id of the severing blade. The stripping roller 37 will cause the tape to be stripped from the severing blade and moved downwardly into contact with the roller 29. It will be noted that the roller 3! contacts the tape at a substantial distance rearwardly of the line of severance so that a free end will project forwardly of the rollers 29 and 31. i

In Fig. 8 of the drawing, I have shown a slight ly modified form of the invention, wherein in stead of the guide pins or studs 48an'd 49, 'de-i mov egoer other respects-this form ofilmy 'inventiom i's like' that previously described and illustrated in Figs;-

guiding means feathe -guard member 'in 'its movements w and f'rom operative position;

A fiirther modification" of" my invention: is:

shown in Figs: 9- and 10"-whereinthe guard-mem bierT ll-ishinged to the stripper part 3 any meansof--"a*-hihgepih- 56 which passesthrough-eyes 5"! provided upon theguard-member; and similar eye 'm'embers"5B"-provide'd on" the-part 351* v coil spring 59 surrounds=this spring" ping one end acting against the member and the other against the guard member *4 4 -soas." to normally; urge -t-hese'-- members apart or urge" the guard member upwardly as shown: Fig. 9E

uppei guide member 6-0 is provided and. the spring 59 holds the guard memberfial in'en gagement-with the-lcwen'surface of the'i member 6'02 This guide= =member canbe provided 'in' any desirediorm; but, as shown; it" is 'providewby an integrally formed projection on: the upper-"wail? of the case l 2";

While--I have shown and described: some preferred embodiments: of my invention; it"wiil" be under-stood'that'it'isnotto be limited to all of thedetails shown, but is,capab1e,.of modification amtvari'ation within the spirit'of'the invention and within the: scope of" the claims.-

Whatil claim is:

l-. Ai-tape-rdispenser comprisingqa casing'ihawingsam opening through which t'he' tape is; drawn, ai'severingablade supported by; the' casing; adiias cent; theropening, a guard fonthef: bladeshaving atfnee end normally extending t-hrough the open;- mgr-between; the blade anctthe 'tape to coverth'e blade, actuatingmeans fermovinggsaid guard-aim wandlyp and outwardly throughl'said openingtibeitween't-he tape and the blade; in ane'arcuate path; saidi means comprising;-ancactuatingtmeme ber withinsthe casing .connectedrto said-guard member-*andt'adapted to. be :engaged by thesitape to be moved thereby as the latter is drawn toward the blade, and guide means engaging the guard at a point spaced from its connection with said actuating member to guide the guard in said arouate path.

2. A tape dispenser comprising a casing having an opening through which the tape is drawn, means therein to support a roll of tape, a fixed severing blade carried by the casing against which the tape may be severed, a stripper member movably mounted in the casing to strip the tape remaining on the roll from the severing blade, a guard member carried by the stripper member and having a free end normally projecting through said opening to stand between the tape and the blade and forwardly of the edge of the blade, said stripper member having a part in contact with the tape as it issues from the roll, and means for guiding the free end of the guard member for movement between the knife and tape and to an unguarded position below the knife upon movement'of the stripper member toward the blade.

It" will be" apparent that as the; spring SE -tends to-urge the guard memben l l" upwardly no lower guide member-is necessary; It will be understood, that? the operation* of? the 6* 3% A tapedispenser comprisingrzarsupport. a roll 'of tap.e,-. a severing blader carriedby the; support against: which thetap'e'. may besseveredg astripper. member mountedi lorrthe-support for? movement toward from'wthe biades toestripr the-taperemaining on: the roll omith'e iseveringr blade; a guard member- Hinged itoi said stripper member tobe moved thereby' 't'owardcand' from a guarding position: with respect to the blttdbi and normally standing forwardly. of: the edgeof the blade and mean's for guiding the "guard memher in its-movement.

4 A tape' dispenser comprising asupport' fbnfi a rolloftape, a severing bladecarried by the.

support ag-ainstwhioh the tape may beasevered}, as

stripper membermovablymounted on the sup port tostripthe -tape remaining on the roll frorm the severing blade,- and a guard 'memb'er 1 carried by said strip-per member 7 and having a free-"end? normally-"standing forwardly-oi the =edge= oi the blade and between theblade andthetape path," said stripper member being engaged and-*moved by contact of the tapetherewith as it is drawn toward the severing-blade said' guardmembem being moved to inoperative position by movement of-'*thestripper member toward-- the-blade, and means-"for guidi'ngthe free end of thew guard member for "movement between theknife and tapeand to an unguardedposition below the knife upon movement of the-stripper-member? 5: A tape'dispenser comprising a' suppor-t' for a rollof tape; asevering blade-carried-"bythe sup port against which the tape'--may-=be severed, a? stripper member" mounted on the supportfor movement toward and from theblade to-strip*the-' tape remaining on the rollf-ronr-theseverihg blade, a guard member hinged tosaidstripper member and-movable therewith: to"and---from"a' guarding position with respect to" the-bladey said guardmem-ber normally standing forwardlyof the edgewf the severing blade; and means to guide the guard member in its movement's? 6; A tapedispenser comprising a-support for a roll oftape; aseveri'ng blade carried by the-sup portr' against which the tapemay be severed; a

stripper member mounted" cm the supportfor movement toward and-- from the blade and having a part adapted to be engaged by thetape to effect movement of thestripper member; a guard member" hinged to the" stripper member, said guard member projectingforwardly over-the edge' of the -blade and adapted to be movedhy the stripper member to-' expose the edge of theblade; and means to guide the guard member in its movements.

7. A tape dispenser comprising a support for a roll of tape, a severing blade carried by the support against which the tape may be severed, a stripper member movably mounted on the support for movement toward and from the blade to strip the tape therefrom and having a part adapted to be engaged by the tape to effect movement of the stripper member, a guard member hinged to the stripper member, said guard member projecting forwardly over the edge of the blade and adapted to be moved by the stripper member to expose the edge of the blade, and means to guide the guard member in its movements, said means comprising spaced elements one upon each side of the guard.

8. A tape dispenser comprising a support for a roll of tape, a severing blade carried by the support against which the tape may be severed, a stripper member movably mounted on the support for movement toward and from the blade a roll of tape, a severing blade carried by the support against which the tape may be severed, a stripper member movably mounted on the support for movement toward and from the blade and having a part adapted to be engaged by the tape to effect movement of the stripper member, a guard member hinged to the stripper member, said guard member projecting forwardly over the edge of the blade and adapted to be moved by the stripper member to expose the edge of the blade, means to guide the guard member in its movements comprising a guide element against which the guard member engages, and spring means urging said guard member against said element.

10. A tape dispenser comprising a support for a roll of tape, a severing blade carried by the support against which the tape may be severed, a stripper member movably mounted on the support for movement toward and from the blade and having a part adapted to be engaged by the tape to effect movement of the stripper member, a guard member hinged to the stripper member, said guard member projecting forwardly over the edge of the blade and adapted to be moved by the stripper member to expose the edge of the blade, means to guide the guard member in its movements comprising a guide element against which the guard member engages, and a spring acting between the stripper member and the guard member to hold the latter against said guide element.

11. A tape dispenser comprising a support for a roll of tape, a severing blade carried by the support against which the tape may be severed, a stripper member mounted on the support for movement toward and from the blade and having a part adapted to be engaged by the tape to effect movement of the stripper member, spring means to return said stripper member to normal position after the latter has been moved by engagement with the tape, a guard member hinged to the stripper member, said member projecting forwardly over the edge of the blade and adapted to be moved by the stripper member to expose the edge of the blade and returned to a position forwardly of the blade to guard the same and means to guide said'guard member in its movement.

12. A tape dispenser comprising a support for a roll of tape, a severing blade carried by the support against which the tape may be severed, a stripper member movably mounted on the support for movement toward and from the blade and having a part adapted to be engaged by the tape to effect movement of the stripper member, a guard member hinged to the stripper member, said guard member projecting forwardly over the edge of the blade and adapted to be moved by the stripper member to expose the edge of the blade, and means to guide the guard member in its movements, said means comprising spaced elements one upon each side of the guard and at least one of said elements being an antifriction roller.

13. A tape dispenser comprising a support for a roll of tape, a severing blade against which the tape may be drawn to be severed, means for supporting said blade, astripper member mounted adjacent said blade for movement toward and from the blade to strip the tape therefrom after a severing operation, a guard member carried by the stripper member and normally standing forwardly of the edge of the blade and being moved away from the blade by movement of the stripper member, said guard member being hinged to said stripper member and means to guide the guard member in its movement.

ALFRED P. KRUEGER.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,397,927 Flick Nov. 22, 1921 1,525,012 Tinkham Feb. 3, 1925 2,052,541 Roberts et a1 Aug. 25, 1936 2,125,736 Murray Aug. 2, 1938 2,138,154 Grunwald Nov. 29, 1938 2,231,140 Richardson Feb. 11, 1941 2,233,361 Anderson et a1 Feb. 25, 1941 2,324,204 Fischer July 13, 1943 2,324,349 Atkins July 13, 1943 2,352,445 Pinckney June 2'7, 1944 2,434,776 Van Cleef et a1 Jan. 20, 1948 2,555,187 Erhardt May 29, 1951

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