US1024186A

US1024186A - Stencil-duplicating apparatus.

Info

Publication number: US1024186A
Application number: US60068611A
Authority: US
Inventors: Albert B Dick
Original assignee: AB Dick Co
Current assignee: AB Dick Co
Priority date: 1911-01-04
Filing date: 1911-01-04
Publication date: 1912-04-23
Anticipated expiration: 1929-04-23

Description

A. B. DICK.

STENCIL DUPLIGATING APPARATUS. APPLICATION FILED JANA, 1911.

Patented Apr. 23, 1912 3 SHEETS-SHBET 1.

A. B. DICK.

STENCIL DUPLIOATING APPARATUS.

APPLICATION FILED JAN. 4, 1911.

Patented Apr. 23, 1912 3 SHEETS-SHEET 3.

nut Tar ALBERT DICK, OF LAKE FOREST, ILLINOIS, ASSIGNOR TO ATE. DICK COMPANY, OF CHICAGO, ILLINOIS, A COBL PORATION OF ILLINOIS.

' To all whom it may concern:

Be it'known that I, ALBERT B .\DICK, a citizen of the United States, residing at Lake Forest, in the countyof Lake, in the State of Illinois, have invented certain new .and useful Improvements in Stencil-Duplieating Apparatus, of which the following is a specification.

This invention relates to stencil duplieating apparatus, and its object 'is toefi'e'ct certain improvements in the construction of apparatus of thischaracter whereby -the work of feeding in the sheets to the stencil carrying drum is' greatly facilitated and superior results are obtained, particularly in that betterregistration may be secured and the printing may bemade to extend as close to theiedges of the sheet as is desired.

In stencil duplicating machines as now commonly employed, the impression sheets are fed manually to a position'in which the forward edge lies bet-ween the drum and the underlying pressureroller.

One of the features of the present invention involves the provision of sheet feeding devices which grip'the sheet and forward it mechanically between the drum and pressure roller. With such apparatus, suitable adjustment may be made whereby the sheet may be so imprinted upon that the printed matter begins close to the edge of the sheet.-

Another' feature of improvement lies in the provision of means whereby, incase no sheet is fed to the drum at the proper time,

the pressure roller will be held in inoperative'position so that it will not coact with the drum and therefore will not take up ink from the drum, which ink would be de posited on the back of the neXt sheet to be passed through the machine.

This and other features of the invention, together with the advantages secured bytheir use, will be fully described in connection with the accompanying drawings, which illustrate the preferred embodiment of the invention. a In the drawings, Figure 1 is a top view of the machine with the drum removed and certain other parts broken away; Fig. 2 is a side view of the machine broken away in part; Fig. 3 is a vertical-section of the machine, on line 3-3 of Fig. 1 certain of the parts being shown in elevation; and Figs. 4, 5 and 6 are views of certain of the Specificationof teeters Patent. 'P mnw Apr, 23, 1912, Application filed January "4,i1911i.

Serial No. 600,686.

2, and an operating handle 8, is secured to the shaft 7. A train of gears," 9, 10, 11 and 12, is driven from the pinion 6f, the gear 12 being mounted upon a shaft,13, which is rotatable in bearings formed in the side frames. Shaft, 13 carries a sheet feeding roller, and this roller preferably-consists of a plurality of sections. 14:- The'gearing-op erated by the handles sis such that the sheetfeeding roller 14 makes one revolution" for each revolution of the stencil carrying drum 4. The sections 14: of the sheet feeding roller have a portion, 15, which is of greater radius than the remainder of the section. Co-acting with the sheet-feeding roller 14 is a second roller, 16, directly overlying the roller 14, and mounted for rotation in bearing boxes which are slidable in ways formed in the side frames, and are pressed downwardly by springs 17. The ways in which these bearing boxes slide are of such depth that the roller 16, which is preferably of sectional form, may co-act with the portion 15 of the sheet feeding roller 14', but not with the portion thereof which is of less diameter. Secured upon the shaft 13 isa cam,17 adapted to operate stops, 18, which facilitate positioning the impression sheets. The sheets are fed by hand or otherwise over a feed board, 19, mounted upon the side frames of the machine. The stops 18 project upwardly through openings in the feed board, 19, and are formed upon the edge of a plate,

20, which is pivotally mounted at 21 upon the underside of the feed board 19. The plate 20 is provided with a downwardly eX- tending projection, 22, carrying a roller, 23

which rides on the peripherey'of the cam, 17

The pressure roller, 24, underlying the stencil carrying drum, is mounted for rotation in arms, 25, which are pivotally mounted at 26 upon the side frames of the machine, and springs, 27, are connected at one end to an arm, 25, and at the other end to a stud on the side frame, these springs acting to draw the pressureroller 'upward into co-action with the drum.

When the sheetis positioned upon the feed board, with its forward edge in coaction with the stops 18, and the handle 8 is turned, the drum and the shaft 13'will be revolved, until the projection on cam 17 passes from under the roller 23, whereupon the stops 18 will be caused to drop by a spring, 28, acting thereon, until thelr ends are below the surface of the feed board 19; immediately thereafter the portions '15 of the sheet feeding roller, 14, will grip the sheet between them and the sheet feeding roller 16, and these two rollers will forward the sheet over the surface of the feed board until its forward edgepasses between the stencil carrying drum and the pressure roller 24. The enlarged portion, 15, of the roller, 14, is of such length that immediately after the edge of the sheet passes between the drum and the pressure roller, the sheet is respring, 35.

leased by the

sheet feeding rollers

14 and 16, so that the subsequent movement of the sheet is efiected solely by the drum and pressure roller, and therefore there is no tendency to move the sheet angularly to an improper position orto buckle and crease it; Furthermore, it will be noted that by properly adjusting the gear, 5, with respect to the drum 4, as is well known in the art, the printing may be made to begin as near the forward edge of the sheet as may be desired.

Immediately in rear of the openings'in the feed board 19, through which the stops 18 project, areother openings through which upwardlyextending fingers 29 are adapted 'to project, these fingers being carried by a shaft, 30, which is mounted for rotation in brackets, 31, depending from the underside of the feed board 1 9. Secured to therod, 30,'is a downwardly extending arm, 32, carrying a roller, 33,-which rides-on the periphery of a cam, 34, secured upon the shaft, 13, adjacent to the side-frame 3. Roller 33 is held in engagement with the cam by a Beside the cam 34 is 'a second cam, 36, also secured on shaft 13, and adapted to actuate a roller, 37, mounted upon a stud, 38, projecting laterally from a lever, 40, which is pivotally mounted at 41 upon the side-frame 3. A spring, 42, bears on arm-4O in a direction to hold roller 37 down on the periphery of cam 36. The lower end,

39, of lever 40 is pivotally connected to one end of a link, 43, and near the opposite end of this link 43 is a stud, 44, which passes through a slot, 45, formed in the lower end of the arm, 32. On the link 43, above the stud 44, is a laterallyprojecting stud; 46. A rock shaft, 47, extends between the sideframes of the machine and is journaled in bearings therein. Secured to this rock shaft near the side-frame 3 is a lever, 48, one end of which is adapted to co-act at times with the stud46. The opposite end, 49, (Fig. 3)

of this lever 48 lies directly over the end of the adj acent arm, 25, carrying the pressure roller. Near the side-frame 2, an arm 50 is secured to the rock shaft47, its free end directly overlying the end of the adjacent arm 25. This arm, '50, carries at its free end a roller,-51, which is adapted to oo act with a cam, 52, adjustably secured to oneside of the stencil carrying 'drum',.4; 7 An inclined guide 53, extends between the side 'frames above the feed board 19, and at its forward edge is provided with projections 54'extending between the sections of the feed roller 16 and directlypvrlying the fingers 29, but having openings in them through which the ends of fingers 29 may pass.

' The operation of these parts of themachine will now be described: Fig. .5 shows the position of the. parts. at the time when a sheet is to 'befed into position, and it will be seen that the fingers 29 are down so that.

the sheet may be moved forwardly until its edge is arrested by the stops 18. If the handle 8 be now actuated so as to turn the drum in the direction for printing, shaft 13 will be turned in a clockwise direction, as seen in Fig. 5,'and the 'high point of the cam-34 will pass from under the -roller 33,

thereby allowing spring 35 to rock-shaft 3O in its bearings, and thus move the ends of fingers 29 upwardly into engage'mentwith the sheet. The upward movement of the fingers 29 will bearrested by the sheet be fore'the fingers have made the full movement of which they are capable, and arresting the movement of the fingers 29 'thuS also arrests the turning movement of arm 32, link 43 and the stud 46 carried by'link 43. On continued rotation of shaft 13 with the drum, the raised-portion of'cam' 36 will act on roller 37 to lift lever 40 and link 43 against the tension of spring 42, the stud 44 moving upward in the slot 45 and the.

stud 46 rising At the same time the cam roller 24 so thatthe pressure roller will be 'out of cooperative-relation with drum 4-as shown in.Fig..1. As'the pressure roller is depressed thus, the end, 54 of the lever 48 52 will engagetheroller 51, thereby rocking the shaft 47 and depressing the pressurev 54 of lever 48 for the reason that the turning a movement of arm 32 when fingers 29 were raised was not sufficient to carry the stud 46 under the end 54 of'lever 48; for this reason, when the end of cam 52 passes beyond the roller 51 there will be nothing holding the pressure roller from being raised to o erative position in co-action with the drum by the springs27, and therefore the roller will be. so raised, the lever 48 rocking'freel with rod'47. During these movements the parts, the sheethas been moved forwardly by the sheet feedingrollers 14 and 16, as above described, so that when throughfthe machine. Thisis the ordinary operation of the parts. But, if no sheet has the pressure roller is moved upward it grips the sheet between it andithe drum, and the sheet is imprinted upon and forwarded been positioned upon the feed board with its edge in contact withithe stops 18 at the time when thefingeis 29 are raised, those fingers will be raised a greater amount, and

f as 'a result-the arm 32 will have a greater excursion,this excursion being such that the stud 46 .on the link 43 'is, carriedunder the end 54 of lever 48. In this case, when the stud is raised by the cam 36, and the end 54 of lever 48 is raised-by the depression of its end, 54, downwardly is precluded by'the stud 46. The pressure roller will, therefore, be held in its 'inoperativeposition in which it is shown in Fig. 4, while the drum 4 is given one revolution, whereupon the operation will be repeated. -It will thus be seen that-whenever a sheet is positioned properly uponthe' feed board, the operation of the machine will result in the forwarding of the sheet, the raising of the pressure roller to operative position, shown in Fig. 3, and the printing and forwarding of the sheet, but if ever the operator fails to place a sheet in proper position, during the operation of the machine thereafter, the pressure roller will-be held in its depressed or inoperative position, so that it will not contact with the drum and receive ink therefrom. Thestud 46 serves as a lock forholding the pressure-roller down after it has been moved down by cam 52. This stud 46 is moved vertically by cam 36, lever 40 and link 43, and it is moved laterally by fingers 29, arm 32 and cam 36. But ,its

- lateral movement will be checked when a parallel with but displaced from said drum and roller, means for rotating the drum and for rotating the sheet-feeding roller one revolution during each revolution of the drum,

and a second sheet-feeding roller ooacting with said sheetefeeding roller to feed sheets between them to the drum and pressureroller, one of said sheet-feeding rollers having a portion of greater radius than the remainder of the roller which portion only is adapted to coact With the other sheet-feeding roller to feed sheets to the drum and said portion being of such length. that the sheet is released by the two rollers as soon'as it is moved into coaction with thedrum, substantially as set forth.

2. The combination of a drum, a stencil secured thereon, a pressure-roller mounted adjacent to. the drum and adapted to coact therewith, a pair of sheet-feeding rollers mounted parallel to each other and displaced from the drum and pressure-roller, said sheet-feeding rollers belng adapted to feed a sheet between the drum and pressureroller, means for rotating the drum and for simultaneously rotating one of said feedingrollers one revolution during each revolution of the drum, and means independent of the drum for causing the feeding-rollers to feed a sheet forward a definite and predetermined amount and then release the sheet, the amount of the feeding movement of the sheet being such that the sheet is released immediately after it is gripped by the drum and pressure-roller, substantially as set forth.

3. The combination of a drum, a stencil secured thereon, a pressure-roller mounted roller, which portion only is adapted to 00-- act with the other sheet-feeding roller to feed sheets to the drum and said portion being of such length that the sheet is released by the two rollers as soon as itis moved into coaction with the drum, a stop for position ing a sheetfor coaction with the feeding rollers, and means actuated by said cam for positioning said stop, substantially as set forth.

'4. The combination of a rotatable drum, a pressure-roller movable toward and away from the drum, a pair of parallelsheetfecding rollers mounted adjacent to the line of co-action of the drum and pressure-roller, one of said sheet-feeding rollers'hav-ing. a

portion of greater radius than the remainder .of the roller which. portion only is adapted to coact with the other sheet-feeding roller to 'feed sheets to the drum and said portion being of such length that the sheet is released by. the sheet-feeding rollers as soon as it is moved into coaction with the drum,

,means for simultaneously rotating the drum and the sheet-feeding rollers, a support for pressure-roller coacting therewith, means for moving the pressure-roller away from holding a sheet in position to be forwarded by said sheet-feeding rollers, a member adapted to coact with asheet on said support and means dependent upon the coaction of said member with a sheet for controlling the position of the pressure-roller with respect to the drum, substantially as set forth.

5. The combination of a rotatable drum, a

the drum to inoperative position once in each revolution of the drum, a pair of parallel sheet-feeding rollers mounted adjacent to the line of coaction of the drum and pressure-roller, means for simultaneously rotat-, ing the drum and one of said sheet-feeoL' ing rollers at the same speed, a support for holding a sheet in position to be forwarded by said sheet-feeding roller, a -member adapted to coact with a sheet on said support and means dependent upon the coaction J of said member with a sheet for locking the pressure-roller'in inoperative position after it has been moved to'that position, substantially as set forth.

6. The combination'of a drum, a pressure-I,

roller coacting therewith, means for moving the pressure-roller away from the drum to inoperative position once during each rotation of the drum, a support for a sheet to be fed to the drum, a pressure-roller and means for locking the pressure-roller in inoperative position after it has been 'moved to that position comprising a locking member movable in two directions as the drum is roing rollers, a support for holding a sheet in positionto be forwarded by said sheet-feeding rollers, a movable stop for positioning a sheet on said support, a cam on the shaft of one of said feeding rollers for actuating said stop, a member adapted to coact with a sheet on said support, and means dependent upon the coaction-of said member with a sheet for controlling the position of thepres sur'e-roller'with respect to the drum, sub{ stantially' as set forth.

' ,8. The combination ofa drum,'a movable pressure-roller.coacting therewith, a pair of parallel sheet-feeding rollers mounted adjacent to the line of coaction of the drum and pressure-roller, means for simultaneously rotating the drum" and said sheet-feeding rollers, a cam on the shaft of one of said sheet-feeding rollers, a support for holding a sheet in position for coaction with the' feeding rollers, a member positioned by said cam-and a sheet onsaid support, and means controlled .by said member for positioning the pressure-roller with respect to the drum, substantially as set forth.

9, The combination of a drum, a movable pressure-roller coacting therewith, a pair of parallel sheet-feeding rollers mounted adj acent to the lineof coactionof the drum and pressure-roller; means' for simultaneously rotatingthe drum and said sheet-feeding rollers, a cam on the shaft of" one of said sheet-feeding rollers, a support for holding a sheet in positionfor coaction with the feeding rollers, means for moving the pressure-roller to operativeand inoperative positions, and al'ook forholding the pressureroller in inoperative position controlled by said cam and a sheet on said support, substantially as set forth.

10. ,The combinatiorr'of a drum, a movable pressure-roller coacting therewith, a sheet-feeding roller, means for operating the drum and said sh'eet-feeding roller at the same speed,a cam'on the shaft of said sheetfeeding roller, a second sheet-feeding roller coacting with said feeding roller, a support for holding a sheet in 'position for coaction with said feeding rollers, and a member positioned by said cam and a sheet on said support for-controlling the position of the pressure-roller with respect to the drum, substantially as set forth.

11. The combination of a drum, a movable pressureroller coacting therewith,'a sheet feeding roller, means for operating the drum and said sheet-feeding 'roller at the same speed, a cam on the shaft of said sheet-feeding roller, a second sheet-feeding roller coacting with said feeding roller, a support for holding asheet in position for coaction with said feeding rollers,'a stop for positioning a sheet on said support, means for moving the stop to operative and inoperative positions, and a member ositioned by said cam and a sheet onsaid support for position of, the' pressurecontrolling the to the drum, substantially roller with resp'e as set forth. 1

12. The combination of a 'dr um',.a movable pressure-roller 'coacting therewith, a sheet-feeding roller, means 'for operating the drum and said sheet-feedin roller. at the same speed, a cam on'the shaft of said sheetfeeding roller, a second sheet-feeding roller coacting' with said roller, "a support for holding a sheet in position for coaction with said feeding rollers, means for moving the pressure-roller to operative and in operative positions With'respect to the drum and a lock for holding the pressure-roller in inoperative position controlled by both said cam and a sheet on said support, substantially as set forth.

13. The combination of a drum, a pressure-roller, a feeding roller, means for retating the drum and feeding roller at the same speed, a support for a sheet to be fed by the feeding roller, means for moving the pressure-roller to operative and inoperative positions, and means for locking the pressure-roller in inoperative position comprising a'locking member, cams on the shaft of said feeding roller for moving said locking member in two directions and means controlled by a sheet on said support for regulating the movement of'said locking memher in one direction, substantially as set forth.

This specification signed and witnessed this 29th day of December, 1910.

, ALBERT B. DICK.

. Witnesses:

M. H. BURKART, W. ARNOLD.