US1569650A - Mechanism for feeding material from rolls - Google Patents

Description

Jan. '12 1926. 1 1,569,650

J. 5. CObDWELL MECHANISM FOR FEEDING MATERIAL FROM ROLLS Filed Dec. 29, 1925 2 Sheets-$heet'1 [N V/iN TO A 5'. 6

Way

A TTORNEY J. s1 COLDWELL MECHANISM FOR FEEDING MATERIAL FROM ROLLS Filed Dec. 29, 1923 2 Sheets-Sheet 2 Jan. 12 1926.

1,! TTORNE Y Patented-Jan. 12, 1926.

, 30m 8'. connwnnnor MI WAUKEE,

or MILWAUKEE, Wisconsin.

man we. co.,

WISCONSlIN, ASSIGNOR 'ILO THE CUTLER-HAM- A CORPORATION OF WISCONSIN.

MECHANISM FOR FEEDING MATERIAL FROM ROLLS.

Applicatlo .To all whom it may 'concern:' Be it known that I, J onx -'citizen of the United States, waukee, in' t he county of- State of'Wisconsin, useful Improvements in Feeding Material from Rolls,

S. ComwnLL, -a residing at Mil- Milwaukee and have invented new and Mechanisms for of which the following is a full, clear, concise. and exact description, reference being had to the accompanying drawing, forming a part of this specification.

This invention-relates to mechanisms for receiving mafeeding'material from rolls to i chines and more particularly t mechanisms for printing presses.

-Web feeding mechanisms o web feeding for printing presses commonly include braking means for effecting a drag on active web roll to tension the same is drawn into the press.

the spindle of an the material as 'Heretofore considerable. effort has been made to provide a mechanism for regulating such braking means the web substantially constant.

it has been found unnecessary to maintain the tension on However, in the operation of printing presses to maintain a constant tension on the web providing the variations in tension are gradual, more, effect a given the web when exhausted.

The present and further-- it has been found very desirable to reduction in the tension on the roll is about to become invention has among its ob jects to provide a web tensioning device which is adapted to automatically effect a predetermined reduction in the tension on the web when the roll is about to become exhausted and which automatically maintains the tensionon the web b termined limits during unwi roll. Another object etween predending of the is to provide a tensioning device of the aforesaid character wherein the weight ofthe web ing mechanism therefor serves tension on the web.

roll and the supportto control the Another object is to provide a web tensioning device of the aforesaid character which is capable of control f rom a remote point such as the delivery end of the press for variation of the tension on the web.

Another object is to provide a web tensioning mechanism of the aforesaid character having its parts arrange d to facilitate December 29, 1923. Serial No. 683,806.

removal of an exhausted roll and installation of a new roll.

Another. object is to provide a web feeding mechanism, includinga plurality of web tensioning devices of the aforesaid character having their parts arranged to facilitate pasting of the web of a reserve roll mounted on either of thedevices to the web of an exhausted roll mounted on the other.

Another object is to provide-a web feeding mechanism having improved margin adjusting means associated therewith.

Various other objectsand advantages of the invention will hereinafter appear.

The accompanying drawings illustrate certain embodiments of the invention which will now be described. it being understoodthat the embodiments illustrated are susceptible of modification without departing from the scope of the appended claims.

In the drawings,

Figure 1 is an end elevational view of a web tensioning device embodying the invention. a

Fig. 2 is a side elevational view of such device, certain parts thereof being shown in section.'

Fig. 3 is a detail view of certain of the parts shown in Figs. 1 and 2. h

Fig. 4 is a'simplified end view of a web feeding mechanism including a plurality of the web feeding devices of the character shown in Fig 1, and

Fig, 5 is an end' elevational view of a part employed in the embodiment shown in Fig. 3, certain of the parts of the tensioning devices being shown in section.

Referring to Figs. 1 and 2, the same illustrate spindles 1 and 2 for supporting a web roll 3. The web roll 3 is provided with a hollow core member (not shown in the drawing) and spindles 1 and 2 are adapted to be inserted into opposite ends of said core member to support the web roll and to rotate therewith. Spindles 1 and 2 are carried by arms 4 and 5, respectively, rotatably mounted upon a shaft 6, supported at op- Jarms and l6,'respc ctively, which are fixed. to shaft 6.: As hereinafterset forth, power left *thereof is supported by a ball bearing.

with a cooperating brake slide 14. ii rake shoes 13 and Marc pivotally secured to operated means is provided for rotating shaft 6 to vary the angular position ofarms 1 5 and 16 for variation of the tension on the web and power operated means is also provided for adjusting arr'ns' 4 and 5 axially on shaft 6 to elfect margin adjustments of the web roll. y

More specifically, spindle 1 is slidably keyed within a hub 11 on brake drum-ll and said hub projects outwardly beyond said brake drum in opposite directions. The left hand end of the .hub '11 is supported by a ball bearing 17 mounted on the 11 per end of arm- 4: while the right hand end of said hub is supported by aball bearing 18 carried by a bracket 19. fixed to arm 4.. As before stated, spindle l is slidably ,keyed within thehub '11! and the same is adjustable'axially therein by a screw-20 threaded into the hand end ofsaid hub. The inner end of screw 20 has an enlarged head 21 fitting within a'T'slot-in the end'gbf spindle 1 and said screw ha's an adjusting hand'wheel 22 fixed thereto and a locking hand'jwheel 23 threaded thereon for engaging the right hand end of hub 11%. S indle2 .is fixed within the 'hub of brake rum"- 12fand the same is supported adjacent its right hand end by a ball bearingfi; mounted on the upper end of arm 5 while the left liandlend carried by an arm 26 fixedto arm 5.- a

Springs27 and 28 tend tqmove arms 4;

and 5 in; a counter-clockwisedirection with 15 and 16, as shown in respect to arms Fig. 1.

29 while spring 28 is held under compression betweeri'bracket 26 and thecap member.3 0. Cap members 29 and 30 each have anadi justing screw 31 associated therewith, the screw associated with the former capmem her. being threaded into a lug 15" Offfiijlfl: l5 and thescrew associated with the'latter' cap member being threaded into a lug 16 on arm 16. Each of the arms 15-and 16 has a lever 32 pivotally secured thereto and each of said arms is provided with a projecting l ug having a drilled opening thereinfor receiving a pin 33. The inner end of the pin; 33 associated witharm '15 is arranged to abut bracket 19 while the inner "end of--the pin 33.associated with arm 16 is arranged to abut'bracket 26. As shown in. Fig. 3. the levers 32 are each provided witha camsurface .34 and upon movement of said levers from the position indicated in full lines to the position indicated in A dotted lines in'Fig. 3, said cam surfaces are adapted to move the pins 33 inwardly, to

.cause'ar'ms 4 and am move in. a counter- Spring 27; is held under .compre s 'sion between bracket 19 and a' cap member-,-.

clockwise direction with respect to the arms 15 and 16 for disengagement of brake-drums 11 and 12 fromtheir respective-brake,shoes.

[Each of the levers 15 and 16 is provided [with a spring'cli 35 for holding its associated lever 32 1n the position indicated by full lines in'Fig 3.

The function and operation of the aforedescribed web tensioning mechanism will now be more fully set'forth. Assuming that the web :roll is in the position indicated in full j iii"". Fig. 1, it is apparentthat the weight'of 'the'- we b roll together with the weight"of -a rm's iand 5 and the parts carried-by the latter, .is resolved into two component 'forces'. Qne ofsuch forces is in a line extending between the axis of web roll' 3 and the axis of shaft 6.7and the other-is. at

right angles to the former force-and'tends-gt to hold the brake drums lland 12 injengagement with their respective brake'sho'es. It will be observed .that the ratio of such forces. is dependent upon the angular: p os i- 1i tion'of arms .15 and .16. Neglecting'fthe weight of arms iand 5 ja'nd the parts can ried thereby, the 'force tendingtofPhold brake drums 11 and'12 in engagementwitlrtheir respective brake shoes is determined by the weight of -the webrollrand it isapparent that during unwinding ofthe web- 91 1 roll' such force tends to produce a tension on the web which varies in accordance with the-diameter ofv the roll." Neglectingthe weight of. the roll. the weightfof the arms 7 1 and 5 and th'efpart carried thereby tends -..-to hold brakedr'ums' 11 and'12i-in-engagement with their respective shoes tofproduce a ,-braking efie cton the web [roll which-is determined by the degree of compression.- of

springs27 and 28 lheibrakirig e'flect'due to thewei parts carried thereby51produces a relatively slight tension o'ir the "web of large diameter 1 but as the roll decreases the lten to" such brakingyefielc. in. v the roll diam'e'ter'v decrea esa force, due to" the tension 011 .aie' wga-g ends to move the -brake f1 1'- and;fT 12 .Qutiof engagement with thirrespective shoes and when the roll isofrelative small diametergheor the arms andfo' and the. vtgienitheroll is Also,- as increasing such force'tends to'counteradtthe braking effect due .to the weight offith 5 and the partsearried there that when the T011 is oflarge fdiaifieterthe From the foregoing 'itj'willabe bs erv'ed.

tension "the web is almost. entirely de termined by a com onent due to the weight of the web roll whilewhenthe rollis-about to become exhausted the tension on the web is determined almost entirely bya coin 'onent due to the weight of'the; arms t an 5 and the parts carried thereby. Thus; "the initial tension on'the' web can be controlled by varying the. angular position of the arms of the web rolls.

4 and 5 while the final tension on the web can be determined by varying the degree of compression of springs 27 and 28.- In connection with the f'iwegoin'g it should be noted that during starting of the press the braking meanscan be rendered ineffective and thus prevent breaking of the web, by moving the levers 32 to the position indicated in dotted lines in Fig. 3.

As before stated, power operated means is provided for rotating shaft (3 to vary the angular position of arms 1-5 and 16 and, as best shown in Fig. 1, such means includes a motor 36 mounted upon a bracket carried by pedestal 8. Motor 36 is operatively connected to a counter shaft 37 through the medium of a spur gear 38 and a pinion 39- and shaft 6 is driven from said countershaft through the medium of a worm wheel 40 and worm 41. Motor 36 can be controlled from any desired point, such as the delivery end of the press and the same can be also controlled from a point in proximity to the tensioning device to facilitate installation installing a web roll In the motor 36 is operated to bring the spindles l and 2 on a: level with the core member of the web roll, the latter being on the floor. The web roll is then rolled into position between the spindles 1 and 2 and upon alinement of the spindles with the'core member the same are forced into such core member by means of screw 20. The motor 36 is then operated to elevate the roll to the desired position.

Also, asbefore stated, power operated means isprovided for adjusting arms 4 and 5 axially on shaft 6 to effect margin adjustments of the web roll. As'shown in Fig.2, such means comprises a motor 42 mounted upon a bracket fixed to a bearing pedestal 8 and adapted to drive a screw shaft 43 through the medium of a worm wheel 44 and worm 4:). Screw 43 has its left end rotatably mounted within a suitable bearing on pedestal 8. the same being held against axial movement within said bearing, and the right hand end of said screw extends into a nut carried by a. bracket 47. Bracket 47 is mounted upon the connecting member 9, between arms 4 and 5 by a cap member 48 and the same is held against axial move ment on said member but is free to rotate thereon. Thus it is apparent that upon reverse operations of .notor 42, screw 43 will effect axial adjustments of arms 4 and 5 on shaft 6 to effect margin adjustment of the web roll 3. i

Referring now to Fig. 4, the same illustrates a pair of web tensioning devices A and B of the character. hereinbefore described, such devices being arra-nged-side by side and in a reversed relation. The shafts 6 of the tension devices are supported at opposite ends by pedestals C, one of which devices while the roll on the other device is and that the extremity of the reserve web roll can be readily connected 'to the web proceeding from the active roll prior to exhaustion of the latter. In connecting the 'web ofthe reserve roll to the web of the active roll the press is stopped and the web rolls are brought to the position shown in Fig. 4. Paste having been previously applied to the outer surface of the extremity of the reserve web roll, it is apparent-that such extremity can be readily connected to the web proceeding from the active roll. After connection of the webs the press is started and the web of the active roll is severed. During such pasting operations the brake drums arereleased from their respective brake shoes by means of the levers 32 and after the press is started the drums associated with the new roll are moved into engagement with their respective brakes by returning such levers to-normal position.

\Vith the tension devices arranged as shown in Fi g. 4, the margin adjusting means active,

is arranged to eifect simultaneous margin adjustments of both of the devices. The con- .necting members 9 of the tensioning devices are secured together by a bracket 49 (Fig. 5) such bracket being provided with a screw threaded part 50 for receiving the margin adjusting screw 43.

\Vhat I claim as new by Letters Patent is:

1. drawn from a \veb'roll comprising means for imposing a frictional drag on sald roll and for rendering such drag proportional to the weight of said roll, said means including means for resolving the weight of said roll into component forces, one of which is effective to control such drag.

2. A-mechanism for tensioning material drawn from a web roll, comprising means for imposing a. frictional and for rendering such drag proportional to the weight of said roll, said means including means adapted to resolve the weight of said roll into component forces, one of which is effective to control such drag, said latter'means being adjustable to vary the ratio of such component forces.

3. In a mechanism for tensioning material drawn from a. web roll, in combination, a brake drum to be fixed to said roll to rotate therewith, abrake shoe for engaging said drum to' tension drawn from said roll, and supporting means and desire to secure the web as the same is A mechanism for tensioning material drag on said roll Jiirake shoe, said drum tending to move tofor adapted to resolve the v'eight' thereof'iiito com onent forces, one of wh ch facts to'hold sai drum in engagement with he ratio of such component forces; 1 a mechanismfor tensioningmaterial -,drawn from a web roll, in combination, a brake :dru'rnto rotate with said roll, a cooperating brake shoe forengaging said drum to tension the material drawn from said'roll and means for holding said drum in engagement with, said shoe under the action of the weight of said roll and in a direction at an angle to the vertical, said means being adjustable to vary such angle for variation of the tension on the web.

5. In a mechanism for tensioning material drawn fro'm -a webroll, in combination,

supporting means for theweb roll rotatable -"about an axis to one side of said roll, a brake drum associated with said roll to ro- -Tt'at therewith and abrake shoe for engag- ".Ling said drum, said shoe being adjustable to vary the angular position of said roll "with respect to said axis for variation of the "pressure of said drum on said shoe.

- '6. In a mechanism for tensioning material "drawn from a web roll, in combination, a supporting frame forthe web roll including alined spindles to be inserted into opposite ends of the roll to support the same and to rotate therewith, said frame being rotatable about an axis parallel to said spindles, a

" brake drum fixed to one of said spindles and a brake shoe for engaging saiddrum to -tension the web as the saine is drawn from said roll; -,eaid shoe being adjustable to vary thean ular position of said frame for varia- 3 tion 0 the tension on the web.

7. In a mechanism for tensioning material drawn. from a web roll, in combination. a snpporting frame for the web roll including rotate therewith, said rame being rotatable about an axis parallel to said spindles, "a blfake'gdrumiffixed to oneof said spindles, a cooperating brake shoe for engaging said drum to tension the material, proceeding from the roll and a supporting arm for said 'gwa'rds said shoe under the action of the "weight-of said frame andthe roll'mounted thereon, and said arm being movable to vary the angular position of-said frame.

In a mechanism for tensioning material drawn from a web roll, in combination, a

rotatable frame including alined spindles to be insertedinto opposite ends of the roll to sup ort the same and to rotate therewith, a

'bra e drum fixed to each of said spindles,

a brake. shoe associated with each of said f drums and adapted through engagement with the latter'to hold said frame in differcut angular positions and rotatable sup- 'sai'd,i -shoe,-said means being adjustable to ,Pd'rawn from a web roll, in combination, a supporting frame for said web roll, 1nclud-' spindles to be inserted into opposite erids of theroll to support the same and to porting arms for said shoes, said frame and in alined spindles, for supporting the web r0 1 and to rotate therewith, said frame being rotatable about an axis vparallel to said spindles, spindles, a gaging said drum to tension the material 'drawn from said roll, a rotatable supporting arm for said shoe and means for moving said frame with respect to said arm to disengagesaid drum from said shoe.

10. In a mechanism for tensioning mate-' a brake drum fixed to one of said cooperating brake shoe for en-' rial drawn from a' web roll, in combination,

a supporting shaft, a frame rotatably mounted on said shaft and including spindles to be inserted into opposite ends of the web roll to support the same and to rotate therewith, said spindles being arran ed parallel to the axis of said shaft, a braiie drum fixed to one of said spindles, a cooperating brake shoe, a supporting arm for said means for rotating said shaft to vary the angular position .of said arm.

11. A mechanism of the character de: scribed, including separate frames for supporting a .pair of web rolls in a parallel relation each of said frames being provided wiin alined spindles for receiving a web roll therebetween and be rotatable about an axis parallel t6 said splndles to provide for positioning of said rolls with their pemounted on the other. i

brake shoe fixed to'said shaft and 12. A mechanism of the character d'e scribed includin se arate frames for supporting a pair 6 weh rolls in a parallel relation, each of said frames being provided with alined spindles for receiving a web roll therebetween and being rotatable about r0 ls to the web of the other. a

,13. A mechanism of the character de scribed includin" se arate frames for sup- I portingapair' o we rolls in a parallel relation, each of said frames being provided with alined spindles for receiving a web roll therebetweenand being rotatable'about an'axis parallel to said indles, tensioning means associated with eac of said spindles,

said means being adapted to hold said frames in varying angular positions. for variation of the tension on the web'and being also, adapted to move said frame: to a an axis parallel to said spindles 'to facili- J'position wherein said rolls are adjacent each other 'to facilitate sealing of the'webmounted on either of.

roll

extremity of a said framesto the web extending from the roll mounted on the other of said frames.

rolls adjacent each other to facilitate seal;

2o ing of the web extremity of the latter web roll to the web proceeding from the former.

15. A mechanism of the character described including separate frames for supporting a pair of web rolls in a parallel relation, each of said frames being provided with 'alined spindles for receiving a web roll therebetween and being rotatable about an axis parallel to said spindles, a brake drum fixed to one of the spindles of each of said frames, cooperating brake shoes for said drums, supportin arms'for said brake shoes,.power operate means for varying the angular position of said arms, and power operated means for'effecting axial adjustment of said frames.

- 16. In a mechanism for tensioning material drawn from a web roll, in combinaparallel i rotate therewith, said frame bein tion, a supportin frame for said roll ineluding alined spindles for supporting the webrolland to rotate therewith, said frame being rotatable about an axis parallel to said s indles, a brake drum fixed to one ofsai spindles, a cooperating brake shoe for engaging said drum to tension the material drawn from: said roll,- said drum tend ing to move towards said brake shoe under the action of the weight of said frame and said roll,- means for adjusting-said brake 1 shoe to. vary theangular position-of said frame, and auxiliary means move sa d drum out of engagement with said shoe. 17. In a meehanismfor tens onmg material drawn from a web-roll, in combination,

a supporting frame for the roll including aligned spindles to support the roll and to g rotat able about an axis'parallel to saidspindles,

a brake drum fixed to one of said spindles,

a brake shoe for engaging said drum to tension the material drawn from said roll,

a rotatable supporting arm for said shoe, said drum tending to move toward said shoe under the actionof the weight of said rolland said'frame, and-said arm being adjustable to vary the angular position of said frame. and auxiliary means associated with said arm and tending to move said frame in a direction to disengage said drum from said shoe, said latter means being adjustable to vary the effectiveness thereof.

In witness whereof, I have hereunto subscribed my name.

JOHN s. COLDWELL.

tending to

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