US1114327A - Ribbon-feeding mechanism. - Google Patents

Description

,W'. R. ALLEN.

RIBBON FEEDING MECHANISM.

APPLIOAQTTON FILED EEBJ24, 191s.

Patented Oct. 20, 1914.

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W. R. ALLEN.

RIBBON FEEDING MECHANISM. AIfPLIGATION FILED FEB. 24, 1913.

Patented F001;. 20, 1914.

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.WILLIAM R. ALLEN, OF CLEVELAND, OHIO, ASSIGNOR '11'0 THE AMERICAN 1VIULT-I- GRAPH COMPANY, OF CLEVELAND,

OHIO, A CORPORATION OF OHIO.

'RIEBON-FEEDING MECHANISM.

Specification of Letters Patent.

Patented Oct. so, iota.

Application filed February 24, 1913. Serial No. 750,193.

To all whom it may concern Be it known that I, WILLLAM R. ALLEN, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and 5 Stateof Ohio, have invented a certain new and useful Improvement in Ribbon-Feeding Mechanism,of which the following is a full, clear, and exact description, reference bein had to the accompanying drawings.

This invention relates to rotary duplicating machines of the type wherein the printing is effected through an inked'fabric which travels forwardly with the printingsurface at the time of impression and is thereafter retracted. The invention is accordingly in the nature of an improvement on Patent No.

1,004,408, granted Sept. 26, 1911, to The American Multigraph Company as assignee of Harry G. Gammeter. One of the objects of the present invention is to provide simplefand efficient mechanism to give a periodic feed tothe ribbon independently of its reciprocation, to cause it topresent a fresh face to thety'pe on successive impressions.

Another object'is to provide the ribbon operating mechanism in such form that the forward feed of the ribbon is coextensive with the actual matter being. printed, and

0 independent of the size of the printing drum, so that there is no waste of ribbon surface when the type form is short, as, for example, when printing addresses on envelops.

A third object is toprovide a simple device for taking up the forward portion of the ribbon with a practically constant. tension, irrespective. of the size of the. ribbon spool, onto which such forward'portion is 40 to be wound.

A fourth object is to provide convenient means for returning the ribbon to the original spool, whenever desired.

The means by-Which I accomplishthese results, and others contributingto the efficiency of the complete machine, will be described hereinafter in connection with the accompanying drawings, which illustrate a preferred form of my invention.

In the drawing, Figure l is an .endview of a rotary duplicating machine, like the multigraph or Gammeter printer, equipped? with my ribbon mechanism; Fig. 2 is a front elevation of the same; Fig. 3 is a rear elevation, partly in section Fig iis a diagrammatic cross section, illustrating the course of the inking ribbon; Fig. 5 is anenlarged section on the line 5-5 of Fig. 1, illustrating the clutch mechanismfor the supply spool; Fig. :6 is a detail, being a cross section on the line -6. of Fig. 1; Fig. 7 1s afragmentary vertical section on the hue 7 -7- of Fig. 2 looking toward the right.

Fig. 8 is a plan or development of a portion of the drum, showing an address plate which may be used.

As shown in Figs. 1 to 1, 1 indicates the bottom portion and 2 and 3 the end standards of the machine frame. Between these standards are mounted the printing'drum, deslgnated 5', and the rotary platen, designated 6. The printing drum ispreferably a removable segment, as shown at 'T in Fig. 4., mounted on a skeleton drum or frame, consisting of rings 8 on a central shaft 9,

the segment being shown as held to this shaft by a hook 10.

The shaft extends through the frame member 2 and there has a crank 12, or other suitable means for rotating it. The platen 6 is mounted on an eccentric shaft 13 controlled by a handle or crank 14 on the outside of the frame member 2, whereby the position of the platen with reference to the printing surface may be adjusted.

The printing drum may carry on its sur face rails or other means for holding a printing surface. As shown, it" is provided with rails 16, between which may be mounted type grooved on their sides, as shown at 15, Fig- 7. If desired, a suitable address plate 17 carrying type or formed with print-- ingcharacters, may be mounted on this drum, so that the drum may print the body and address of an addressed letter, or may print the body alone or the address alone, as is well understood. The address plate 17 shown in Figs. 7 and Sis a slotted plate carrying individual type. As shown, described and claimed in application No. 535,747 of- H. C. Gammeter (filed Dec. 31,

1909), itis mounted in a recess on the face of the segment, resting on .mutil'ated rails therein, and held by stationary and slidable' clips 18 and 19.

On the printingdrum is a gear 20 meshing with a pinion, not shown, connected with the platen. In printing, the crank 12 is given a left hand rotation and the. material to be printed issuitably fed from the front of themachine,that is from the left hand in Fig. 1,-between t he rotating drum and platen, being delivered at the'right oflrearij v -carrying the block 60, and this block (which of the machine.

The description so far given applies also to the printing portion ofthe multigraphv and to the machine known as the Gammeter printer. M invention relates to the ribbon holding an feeding mechanism designed to coiiperate with such a machine. The ribbon, designated 30, is mounted on a supply spool 31, which is held between two studs 33 and 34 carried on stub-shafts 35 and 36 suitably supported by the end frame members 3 and 2. The stub shaft 35 is mounted in a housing37 and is pressed by a spring 38 toward the spool, a suitable knurled head 39 on the shaft enabling it to be pulled endwise to release the spool, as desired.

' The stub shaft 36 carrying the journal pin 34 at the right hand end of the supply spool is part of a clutch, best shown in Fig.

1 5. As appears in this figure, 40 indicates a suitable bracket or housing secured to the end frame member 2. J'ournaled on .this housing is a bushing 41 having around its periphery gear teeth 42 meshing with an idler 44, which meshes with the-main gear 20. A collar 43 held on the other. end of the bushing by a suitable set screw completes the mounting of the bushing rotatably in the housin a, In the inner face-of this bushing is a conical recess 45, in which seats a conical collar 46 surrounding the shaft 36." The shaft itself has a collar 48 seating in a recess in the collar 46, and the collar 46 is held rotatably on the shaft by means of a plate 49 secured by screws on the end of that collar. The plate 49 has a projecting eccentric stud 50 adapted to enter an eccentric opening in the end of the ribbon spool, so that the collar and spool cannot rotate independently.

The bushing 41 has an intermediate partition 53, and, on the other side of this partition from the conical clutch is a cylindrical recess, in which is mounted a sleeve 54 rigidly secured to the shaft 36, a set screw being shown for this purpose. Between this sleeve 54 and the partition 53 is a helical compression spring 55 surrounding the shaft.

' spring 55 is to draw 'the shaft outwardly free and the spool may turn independently of the drum. I

vThe mechanism which controls the clutch just described is a cam block 60 carried by a sliding bar 61 across the end of the ma- It will be seen the tendency of this.

chine. The bar 61 maybe conveniently located some distance below thes'haft 36 and havean upwardly extending rigid arm 62 may be really the upper end of the arm) is suitably guided along the inner face of a 7, and if this segment is a'semi-cylinder, as

shown in Fig.4, the crank is substantially ninety degrees beyond the lower edge of the segment. Thus, when the-roller 66 engages the arm 65 to free the spool, the segment is -just coming into cooperation with the platen. Accordingly, when the type on the segment do coactwith the platen they find the ribbon already freed from the grip of the mechanism described, and the ribbon is thus drawn forward with the paper by reason of the grip of the type and platen.

During the forward feed of the ribbon and paper when gripped by the type and platen the forward end of the ribbon is [taken up on a suitable reel atthe rear of the machine, ashereinafter described. As soon immediately resets the clutch, so that the spool is clamped to the bushing 41. The rotation of this bushing, by reason of it being geared through the idler 44 to the gear 20, is in the direction to wind in the fabric, so that, during the remainder of the :rotationof the crank, the supply spool 31 is rotated to wind the fabric upon it. Un-

less the equivalent of the full segment of fabric'was drawn off of the spool during the printing 'portion of-the rotation, the re-.

winding action will first take up what has releasing the shaft 36, and the spring 55 been drawn OH and then "the bushing will slip on the clutch collar 46, the tension of the ribbon, anchored at the other end to the receiving spool, holding thespool 31 against further action.

Figs. 1, 3 and 4. The receiving spool is designated 70. It is mounted on journal pins 71 and 72 carried by'two shafts 73 and 74:. The shaft 7st is mounted similarly to the shaft at the front of the machine,

heretofore described, specifically, the shaft 7i consists of a longitudinally slidable rod mounted in a bushing 76 which is Within a housing 77 secured to the frame member 2. The rod has pinned to it a head 78 by which it may be drawn outwardly, and, Within the bushing is a compression'spring 7 9 forcing the rod toward the spool. When the head. 78 is pulled away from the frame member the spool is released and may be taken out by swinging it clear of the head on the rod 74; and then pulling it length wise.

The shaft 73 is provided with an eccentric pin 80 engaging a corresponding opening in the end of the spool, so that this shaft and spool must rotate together. Rigidly mounted on the outer portion of this shaft 7 3 is a ratchet wheel 82. J ournaled on the shaft, and held by a collar 83, is an arm 84 carrying a pawl 85. This arm extends downwardly into a notch 86in the end portion of the slidingbar 61. Accordingly,

when the roller 66 on the crank engages the tent pawl holding the spool while the bar 61 shifts toward the left consequent-upon the roller (56 engaging the arm 68; Accordingly, each complete rotation of the printing drum results in turning forward the ratchet wheel one tooth and feeding correspondingly the ribbon wound on the spool 70.

To temporarily take up the ribbon "fed forward.without regard to the amount of ribbon on the spool 70, I provide aree] which is journaled coaxially with the spool and stands outside of it. This reel consists of several bars 90 (six being shown) pal allel with the axisof the spools and mounted at their ends in-two heads 91 and 92. The head 91 is loosely journaled on the shaft and the bracket 81. The head 92 is loosely j ournaled on the bushing 76 between a head on that bushing and the bracket 77. Rigidly secured to the side of the head 92 is a gear 94; which meshes with a pinion 95 loose on a rod 96 mounted in the brackets 81 and 7 5. Surrounding this rod is a helical spring 97, one end of which is connected with the pinion 95 and the other end with a collar 98 rigid on the-rod. The rod is normally stationary but may be turned by a 77 against the rod. The spring 97, under :knuile'd head 99 to give the spring-the desired tension. The-rod may be clamped in zadjustedposition by a set screw 100 screwing through a stationary boss on the housing tension, tends to rotate thereel, composed of the heads 91, 92 andfthe bars 90, in a di rection to take up the ribbon asfed by the printing surface andplaten.

The ribbon 30 passes-from the rear or inner face of the Supply spool 31 downwardly across the front of the idle roller 102, journaled between points 103 and 104 carried by a ,bracket105 and an arm 106 on the bracket housing 40. From thisidle roller 102 :the ribbon passes rearwardly just above the platen 6 and is thus adapted to be im-' pressed by the type and the platen. From thence the ribbon passes to the reel described, which is under the tension of the the frictional holding of the clutch 45, 46, nor is it sufiicient to draw the ribbon across .the type on the segment, even when the clutch is released. Accordingly, the reel is It is not spring 97. This tension of the spring 97 is I constantly applied to the reel. sufficient, however, to pull the fabric against inactive in winding in the ribbon when the printing drum is stationary, but keeps a tension on the ribbon. j

Before the printing type come into coaction with the platen, the mechanism heretofore described-has released the spool 31, and as soon as this takes place the ribbon feeds freely with the paper toward the rear In this movement the ribof the machine. hon bows outwardly, somewhat, but the reel quickly takes this up by rotating under the action of its spring 97, and thus winds the ribbon onto the bars of the reel surrounding the receiving spool 70. The reel islarge enough so that when it has its maxi mum supply of ribbon wound on it that does not bind the ribbon sufficiently to interfere with the feeding. spool 70 being fed to take in the ribbon, such feeding beingpositive and drawing the ribbon around the reel bars a distance corresponding to one ratchet tooth.

As soon as the type on the drum has passedout of coaction with the platen, the

forward feed of theribbon ceases, for the tension on the reel is not sufficient to draw the ribbon unless fed by the drum, and the ribbon therefore remains in this position until the roller 66 on the crank comes into engagement with the arm 68 and again clutches the supply spool to. the bushing 4.1. This clutching results in the positive gearing of the supply spool in the reverse direction with the drum, so that that drum rotates this spool to wind back the ribbon. The frictional grip of the clutch is. sufiicient so that the ribbon is pulled back and the reel returned to initial position, thus ther rotation of the drum is provided for .by the slipping ofthe clutch, as before described.

The mechanism so far described reciprocates the, ribbonwith each printing impression but gradually winds .it onto the receiving spool 70, so that a fresh face is presented to the type for each impression.

When the ribbonhas"b een entirely wound onto the spool 70 it is necessary either to interchange the spools 31 and" 70 or to rewind the ribbon on the spool 31. The inter-- change may be easily effected by removing both spools from their bearings; passing one of the spools between the drum and platen (when the open space in the drum is downward), mounting the filled spool between the studs 33 and 34'; passing the empty spool rearwardly between the drum and platen,

and mounting it betweeii the studs 7l'and 7 2.;

In place of interchanging the spools, it is very simple to rewind the ribbon directly onto the spool 31 whenever it has accumulated on the other spool. To accomplish this it is only necessary to throw out the ratchet feed, and the mechanism which releases the clutch, and turn down the platen. the spool 31 remains positively geared with the. drum and rotations ofthe drum rotate the spool to wind in-the ribbon. The gear ratio between the drum and spools multiplies so rapidly that a few rotations of the ment of the couple a distance dependent on To throw out the ratchet feed and the drum will return the entire'ribbon.

clutch release, I provide the following mechanism, shown in Figs. land 6. I connect the detent pawl 88 with the feed pawl 85 by a link 120, which is pivoted to thepawl 88 and has a loose slot connection with pawl 85. This makes it normallyddle, but when the pawl .88 is turned upwardly to the free it fromthe ratchet (that-is to'bring it into the position shown indot'ted lines in Fig. 1) the link pulls upwardly on the tail of the pawl 85 and frees it from; the ratchet wheel. The link in this position lies against the projecting pin 89 on which the detent: pawl 'is mounted, which (holds this pawl against turning farther than shown in dot ted lines. Now, to prevent the crank from releasing the clutch, as it normally does every time the roller 66 engages the arm 65, I arrange to withdraw the roller out of the path of the arm 65 but not out of the path of the arm 68. It will be noted that the latter arm is considerably wider than the arm 65. v f

The roller 66 on the crank 12 is carried by a pin 125 which has a head 126and is held in either of two positions'by reason of a spring 127 carried by the crank and engaging in annular depressions in the pin. The normal position of the pin and its roller Then.

away with the necessity of actually interchanging the spools themselves.

It is convenient to provide means for holding'the drum frame stationary to mount the segment thereon, or for other purposes; To accomplish this I may provide a pinion 131 mounted on an arbor 132 which is journaled .in a lever 133 pivoted at'134 to the frame of the machine. This arbor carries a hand wheel 135 'which is provided with a suitable brake or a spring detent preventing inadverent rotation. The hand wheel furnishes means for rotating the drum step by step, as desired, and for holding it against displacement. The turning back of the lever throws the mechanism out of gear altogether. 7

Having thus described my invention, what Iclaimis:

- 1. The combination, with a printing couthe length of the printing face, means for gearing. for'connecting' the same with the couple, at a non-printing portion of the stroke of the latter. a

i 32. 'Dhecombination of a rotary printing cenp'le, a pair of ribbon spools having a ribbon mounted thereon and passing between the members of the couple, the ribbon being adaptedto be fed forward by the'grip of the type and platen, means for taking up the slack caused by such forward feed, and a clutch-'"and'gearingadapted to connect the spool carrying the rear portion of the ribbon with the couple at a non-printing portion of the rotation thereof.

- 3.. The combination of a printing couple which prints by rolling contact, of an inked fabric adapted to extend between the mem bers of the couple,. pay-out and receiving spools for. said fabric, means for periodicallyand partially rotating said receiving spool to feed inthe fabric, and means for taking up the slack independent of either spoo.

4. The combination of a rotary printing couple, a fabric adapted to pass between them, a spool on which the forward end of the fabric may be'wound, means for periodical'ly and partially rotating saidspool to feed the fabric'by short steps, and means on the forward. side 'of the line of printing contact for taking up theslack of the fabric caused bv' it being ripped and fed bythe members of the couple.

'5. The combination, with a printing couple, of a spool, means for periodically rotating it to wind in a fabric which may pass between the members of the couple,

and a reel surrounding the spool on the same side of the line of printing contact for taking up the slack of the fabric.

6. The combination, with' a printing couple, of a fabric adapted to pass between them, a spool means for rotating it to wind up the fabric, and a reel surrounding the spool for taking up the slack.

7. The combination of a printing couple, a fabric through which it prints, a spool for receiving said fabric-,xmeans for rotating the spool, and a reel mounted coaxially with-the spool and having a ribbon-receiving portion outside of and parallel with the axis of the spool.

8-. The. combination of a printing couple, a ribbon adapted to'pass between them, a

spool onwhich the ribbon may be wound, a reel surrounding the spool and rotatable in dependently thereof, a spring tending to rotate the reel in one direction, and means forgiving the spool'partial rotations;

9. The combination, .with a printing couple, of a spool, ratchet mechanism operated by the couple to give partial rotations to the spool, a reel outside of the spool, said reel beingmountefi-I Coaxiallywith the spool, and a spring tending to turn the reel. 1

10. The combination, with a printing couple, of a fabric adapted to pass between the members of the couple, a spool for winding said fabric, ratchet-mechanismfor rotating said spool, a reel having a ribbon re ceiving portion outside of the spool-,gsaid reel having heads journaled on axes alined with the axis of-the spool. 11. The combination of a printing couple, a fabric adapted to pass between the members of the couple, a spool for the fabric, a. shaft connected with the spool at one end, a

ratchet wheel on said shaft, a support for the spool at the other end, a reel having a pair of heads surrounding said shaft and said support respectively and having intermedi ate rods extending parallel with the spool, and means operated by the printing couples for driving the ratchet.

12. The combination of aprinting couple, a fabricadapted to extend between the members of the couple, aspool for receiving the fabric, a reel surrounding the spool for taking up the slack of the fabric, said reel having a gear, a connecting gear, a rod, and a spring surrounding the rod and connected 'with it and at the other end with said connecting gear, whereby'the reel is given a tendency to rotate.

13. The combination, with a printing couple, of a fabric adapted to pass between the members of the couple, a spool for receiving the fabric, a reel for taking up the slack in the fabric, a supply spool for the :fabric, and a clutch for-"the same to alternately connect it with and disconnect it from the printing couple. I

"14. The combination, with a printing couple comprising a rotary drum and a platen, a gear on the rotary drum, a supply spool, a clutch therefor, gearing connecting the clutch with the gear on the drum, and means operated automatically consequent upon the rotation of the couple for clutching and unclutching the clutch.

15. 'The combination, avith a platen,

a couple and mounted on the spool and extending from it in such direction that the forward rotation of the drum tends to wind back the fabric on the spool, and means controlled by the operation of the couple to hold the clutch disconnected during the printing operation and connect it during a non-printing portion of the rotation.

16. The combination, with a platen and a printing drum coacting therewith, of

.ceiving spool for the fabric, a clutch and gearing adapted to connect the supply spool with the printing couple, ratchet mechanism to feed thereceiving spool, and means for throwing said clutch out of action during the'printing portion of the rotation.

17. The combination, with a rotary platen, of a printing drum having printing and non-printing portions, a fabric adapted to pass between the drum and ceiving spool for the fabric, means including gearing and a clutch for connecting the supply spool with the drum at a non-print' iing portion of the rotation thereof and freeing it therefrom during the printing portion of the rotation, and means for giving the rethe printing portion of the drums rotation. 18. The combination, with a platen, of a rotary printing drumhaving printing and non-printing portions, an inking fabric, a supply spool and a receiving spool therefor, a clutch adapted to be connected with or disconnected from the supply spool,

. gearing between said clutch. and the printing couple, and ratchet mechanism between the printing. couple and the receiving spool.

an inked fabric adapted to pass 'between them, a supply spool for said fabric, a re- 'ceiving spool a portion of a rotation during of a printing drum, a supply spool, a clutch platen, a supply-spool for the fabric, a rerec ' or disconnected from the supply spool, gearing between said clutch and the printing couple, and a take-up reel located outside of the receiving spool.

20. The combination of a platen, a cooperating printing drum having printing and non-printing portions, a supply spool, a receiving spool, a fabric extending from one spool to the other and passing interme- I diately between the drum and platen, gearing and a clutch adaptedto connect the supply spool with the printing couple, ratchet mechanism for periodically-rotating the receiving spool and connected with the printing. couple, a take-up reel surrounding the supply spool, means for giving .the reel a tendencyto stretch the fabric, and means operated automatically by the operation of the couple for clutchingand unclutching the supplyspool.

21. The combination of a printing couple,

' a supply spool and a receiving spool, a-fabric mounted on said .spools passlng interme" diately between the members of the couple, clutch mechanism for alternately'connectmg and-disconnecting the supply spool with the couple, periodic feeding means for the receiving spool, and means for throwing out of action periodic feeding means and the disconnection of the clutch to enable the operation of the couple to rewind the ribbon.

22. The combination of a platen, acoopcrating printing drum, a supply spool, a receiving spool, a fabric extending from the supply spool between the members of the couple to the receiving spool,*clutch mechanism adapted to connect the supply spool with the printing drum, ratchet mechanism adapted to feed the receiving spool, and means for throwing out of action the ratchet mechanism and maintaining the clutch engaged to allow the rotation of the drum to rewind the fabric onto the supply spool.

23. The combination of a rotary printing couple, a supply spool, a receiving spool, a reel around the receiving spool, a fabric mounted on the supply spool and extending between the members of the couple and then across one or more bars of the reel to the receiving spool, spring mechanism tending torotate the reel to tension the fabric, clutch mechanism adapted to connect the supply spool withthe printingcouple, mechanismoperated bythe operation of the couple to throw the clutch alternately into and out of action, and means for maintaining the clutch 'in continuous connection with the printing". couple when desired to return the ribbon.

24. .The combination of a" rotary platen, a

rotary printing drum having printing and non-printing portions, a crank for rotating the drum, a supply spool, a receiving spool, a fabric having its ends mounted on said spools and extending intermediately between the drum and platen, clutch mechanism connecting the supply spool with the printing drum, ratchet mechanism for rotating the receiving spool, a shiftable bar for throwing the clutch into and out of action and for operating the ratchet mechanism, and means on the crank adapted to shift said bar first in one direction and then the other.

25. The combination of a platen, a rotary printing drum, a supply s'pool, a receiving spool, a fabric having its ends wound on said spoolsand passing intermediately between the printing drum and platen, a ratchet for feeding the receiving spool, clutch mechaprinting drum having a gear, a clutch barrel.

geared therewith, a longitudinally movable shaft in the clutch barrel, a collar carried by' the shaft and adapted to clutch with the clutch barrel, a spool connected with said shaft, a fabric mounted on the s 001 and extending between the drum an platen, and means operated by the rotation of the couple to move the shaft in or out to clutch or unclutch the spool. 1 I 27'. The combination, with a platen, of'a printing drum having a gear, a clutch barrel geared therewith," a longitudinally movable shaft in. the clutch barrel, a collar carried by the shaft and adapted to clutch with the clutch barrel, a spool connected with said shaft, a fabric mounted on .the spool and extending between the drum and platen, a receiving spool adapted to carry the fabric on the other side of the couple, and shiftable mechanism 'operated by the rotation of the couple for moving the clutch shaft in or out and for feeding the receiving spool.

'28. The combination of a rotary printing drum, a rotator therefor, a rotary impression platen, an inking ribbon extending'between the two, spools mounted off of the drum and carrying the wound up ends of the ribbon mechanism for moving the ribbon in one direction during printing impressions, mechanism driven by the drum rotator forpositively moving the ribbon in the opposite direction at a non-printing portion of the rotation and mechanism for automatically progressing the ribbon by periodically and partially rotating one of the spools.

nism for connecting the supply spool with, the printing drum, a shiftable' mechanism.

29. The combination of a rotary printing drum a rotary impression platen,- a ribbon exteniing between the two spools mounted oflo'l" tl1e lruln carrying the wound-up ends of the ribbon, :1 elutch for controlling one of the spools, :1 ratchet feed for the other spool, a shiftuble'lnelnber controlling the clutch and the ratchet feed, and means operuted by the rotation of the drum for shifting Said member. 1 15 In testin'lony whereof, I hereunto ullix my signature in the presenve of two witnesses WILLIAM R. ALLEN. Witnesses I ALBERT H. BATES. GEORGE T. TRUN one, Jr.

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