US1968738A - Duplicating machine - Google Patents

Description

July 31, 1 934.- H. s. BRAAM 1,953,738

' DUPLICATIILIG MACHINE Filed March e, 1953 5 Sheets-Sheet 1 Hamid J. Efaam INVENTOR mma z/ ATTORNEY H. s. BRAAM 1,968,738

DUPLICATING MACHINE Filed March 6, 1933 5 Sheets-Sheet 2 M/Vf/VTOR ATTOP/Vf) July 31-, 1934. H. s. BRA-AM I DUPLICATING MACHINE Filed lla'rgh 6, 1935 Hafold J .Bfaam IIVVf/V TOR M A TTORNE) July 31, 1934. H. s. BRAAM DUPLICATING MACHINE Filed March 6, 1953 5 Sheets-Sheet 5 Harold J. .Bfaam INVE N TOR 5745/ A TTORNE Y v, to

Patented July 31, 1934 PATENT- OFFICE 1,968,738 DUPLICATING MAcrnN Harold S. Braam Chicago, Ill; Application March 6, 1933, Serial No. 659,651

" s Claims. (01. 101-133) My invention relates to duplicating machines. An object of my invention is to provide a duplicating "machine having" means for making copies from an original sheet without using a gelatin band or a gelatin medium.

' A further object of my invention is to provide a duplicating machine of the type having a flat bed and a carriage movable thereover, which includes novel means for connecting an original sheet with the bed whereby copy sheets may be made directly from the original sheet.

A further object of my invention is to provide a duplicatingmachine of thetype having a flat bedand a carriage movable thereover, which includes novel meansfor actuating the platen roller.

A further object of my invention is to provide a duplicating machine of the type having a hat he'dand a car riage movable thereover, in which novel means are provided whereby the carriage and the mechanism carried thereby may be quick ly, easily and positively actuated.

- Aiurther object is to provide novel means in a duplicating machine of the type having a flat bed and a carriagemovable thereover, for automatically removing the copy sheet from the machinesubsequent to the printing of the copy sheet.

-Other objects and advantages. will appear in the following specification, and the novel features of the invention will be particularly pointed out in the appended claimsz."

-My invention is illustrated in the accompanying drawings, forming part of this application,

Figure 1 is a perspective view of a machine embodying my "invention. i

Figure 2 isatop plan view of the device shown inFigur'eL' Figure 3 is a vertical sectional view taken substahtially along the lines 33 of Figure 2,;

"Figure 4 is a vertical sectional view taken substantially alongthe lines 4-4: of Figure 2, certain portions being shown in elevation,

Figure 5 is a horizontal sectional View taken substantially along the lines 5--5 of Figure-4,

Figure 6 is a vertical sectional view taken substantially along the lines 6-6 of Figure 4,

Figure 7 is a vertical sectional view taken substantially along the lines 7-7 of Figure 3,-

Figure'8-is a vertical sectional view taken along the lines 8- --8 of Figure 5, and I Figures Band 10 are detail sectional views of portions of my device.

In connection with my invention I make use of a primary sheet which maybe typed on a typewriter in the usual manner, and which, when being; typed, has a carbon sheet provided with suitable ink, such as hectograph ink, positioned at the back thereof so that the inked side of the carbon sheet will be in contact with the back at the primary sheet while the primary sheet is being typed. As the primary sheet is typed'with the characters which it is desired to duplicate, the same characters are printed on the back of the primarysheet in reverse by means of the carbon sheet. The primary sheet will hereinafter be re-. ferred to as the master sheet, and it is the side thereof having the characters in reverse that is utilized for duplicating purposes. a

In carryin' out my invention I provide a. su porting: structure or base 10- shown in Figures! and 3, which has the shape in cross-section shown inFigure 8 and comprises a bottom 12, sides 14, a front end 16, arear end 18, and a top 20. l A bed plate 22 is dispcsed'on thetop of the base 10 andis provided withflanged side portions 24 disposed in spacedrelationship with respect to the sides 14. The bed plate may be fixedly connected with thebase 10 in any suitable manher not shown. A. platen plate 261 is disposed in superimposed positionon the bed plate 22 and may be connected therewith by any suitable means such as screws 28. r

The platenplate 26 has the side edges 30 thereof inclined inwardly from top to bottom as shown in Figure 10. A sheet retaining strip 32 is movably mounted on the platen plate as shown in Figures 1 and 2 and is provided with end portions 34' extending over the inclined edges of the platenplate 26 and conforming in part to the inclination of the edges for slidably connect.- ing the strip 32 with the platen plate. 1 i

A sheet retaining plate 36 is slidably mounted on the bed plate 22 and is normally positioned for having the end 38 thereof coentiguous to the end 40 ofthe platen plate 26. i

A fastening block 42 is fixedly connected to the retaining plate 36 onthe' lower side'thereof and extends through openings in'the bed plate 22 and the top side 20 of the base 10.

A spring 44 is connected with the sheet retaining plate'36 and the bed'plate 22 for yieldingly retaining the sheet retainingplate in its normal" position. A knob 46 is connected with the sheet retaining plate 36 whereby the sam may be manually actuated. v r

A pair of blocks 48 is positioned on opposite .sides of the sheet retaining plate 36 and is con-s nected with the bed plate 22 in any suitable manner. The blocks 48 are positioned for engagement by the side edges of the master sheet, and function as side guides so that the master sheet may be properly located on the platen plate.

A carriage 50 is transversely positioned above the base 10 and is movably mounted on the bed plate 22.

The carriage comprises a pair of end plates 52 positioned on opposite sides of the base and extending above the same, and a pair of intermediate plates 54 as shown in Figures 5 and 6 disposed in spaced relationship with respect to the end plates 52. The intermediate plates 54 are connected with their respective end plates 52 by means of cover portions 56 and with each other by means of a connecting cover portion 58.

The intermediate plates 54 are provided with wheels or rollers 60 rotatably mounted thereon and riding on the top surface of the bed plate 22 for movably supporting the carriage. The end plates 52 are also provided with wheels or rollers 62 rotatably mounted thereon which are positioned under the flange portions 24 of the bed plate and engage the lowermost edges thereof.

A platen roller or cylinder 64 is rotatably mounted in the carriage and is transversely positioned with respect to the base 10. As shown in Figures 3 and '7, the platen roller is mounted on a shaft 66, which has the ends thereof connected with arms 68 which in turn are pivotally connected with the intermediate plates 54 by pivot elements or pins 70. The axis of the platen roller 64 is positioned parallel to the top surface of the platen plate 26.

The arms 68 are provided with recesses 69 for receiving the shaft 66 on which the platen roller 64 is mounted, the shaft 66 being retained in the recesses by retaining screws '71 which extend through openings in the arms. This structure provides means for removably securing the platen roller to the arms and thereby enables it to be readily removed and replaced by another when it has become unsuitable for use.

By reason of the arms being pivotally con nected with the intermediate plates 54 it will be seen that the platen roller 64 may be positioned out of engagement with the platen plate 26 or r in engagement with the platen plate in which position the platen roller is shown in Figures 3 and '7.

Means for moving the platen roller out of engagement with the platen plate 26 consists of cam arms '72 pivotally connected with the arms 68 by any suitable means such as pivot pins '74 and having the lower ends thereof in frictional engagement with the top surface of the bed plate 22.

A spring '76 is associated with each of the arms 68 for retaining the platen roller in or out of engagement with the platen plate, as the case may be. Each of the springs 76 has an end connected with the cover portion 58 and the other end connected with the pivot pin '74 of the arm 68 with which it is associated.

When the springs 76 extend below the pivotal axis of the arms 68, they tend to hold the platen roller 64 in engagement with the platen plate 26, but when the carriage is moved to the left in Figures 1, 2, 3 and 7, the cam arms '72, by

reason of their frictional engagement with the is retained in spaced relationship with respect thereto by the spring '76.

Means for moving the platen roller into engagement with the platen plate consists of a pair of lever arms 82, one being positioned at each end of the carriage between the intermediate plates 54 and the end plates 52. The lever arms 82 are pivotally mounted on a shaft 84 which is rotatably mounted in the end plates and partitioning plates of the carriage, as shown in Figures 4 and 6.

The lever arms 82 are provided with projecting elements 86 which extend through slotted openings 88 in the intermediate plates 54, as shown in Figures 4 and 6, and which are adapted for engagement with shoulders 90 of the arms 68 which retain the platen roller 64.

When the carriage 50 is positioned at the right end of the base 10 in Figures 1, 2, 3 and 4, the platen roller 64 is in engagement with the platen plate 26. As the carriage is moved to the left the cam arms 72 lift the arms 68 and thereby raise the platen roller out of engagement with the platen plate. As the platen roller 64 is moved upwardly the shoulders 90 of the arms 68 engage the projecting elements 86 connected with the lever arms 82 and swing the lever arms 82 about their axes until he elements 86 engage ends of the openings 88 and thereby limit the upward movement of the platen roller 64.

As the carriage approaches the left end of the base, the lever arms 82 engage lugs 92 mounted on the bed plate 22, and cause the lever arms 82 to be rotated counter clockwise as viewed in Figure 4.

The lever arms 82, by reason of the elements 86 being in engagementwith the shoulders 90 of the arms 68, cause the arms 68 to be swung downwardly until the springs '76 extend below the pivotal axes of the arms 68, at which time the platen roller 64 will be moved into engagement with the platen plate 26. The bed plate 22 is provided with openings 23 therein for receiving the cam arms '72 when the platen roller is moved downwardly so pin 95 connected with an end plate 52, as shown I in Figures 4 and 6. The latch arm 94 is provided with a hooked end portion 96 for engaging a projecting lug 98 connected with a side portion 24 of the bed plate 22. Stop members 100 and 101 are also connected with the side portion 24, and are adapted for abutting the ends of the end plate 52 for limiting the movements of the carriage. The stop member 101 is carried by a bracket 103 which is adjustably connected with the side portion 24 of the bed plate.

Anactuating handle 102 is fixedly mounted on the shaft 84, and extends through an opening 106 in the cover portion 56. The actuating handle is provided with an arm portion 108 connected therewith. A connecting arm 110 has one end pivotally connected with the arm portion 108 by a pivot element 112 and the other end pivotally connected with the latch arm 94 by a pivot element 114.

It will be noted that the connecting arm 110 is provided with a slotted opening 116 for receiving the pivot element 114 so that when the latch arm 94 engages the lug 98, the latch arm may be moved for lockingly engaging the lug without moving the connecting arm 110 and the handle 102. When it is desired to disconnect the latch and 4, :thehandle is moved to the right thereby causing the arm portion 108 and the connecting arm 110to be moved downwardly for moving the latch arm 94 about its pivotal axis.

As shown in Figures 4, 6 and '7, cam elements- 109' are fixedly mounted on the shaft 84 and are movable into and out of engagement with the shoulders 90 of the arms 68.

As the operator pushes on the handle for movingthe carriage to the right, the foam elements 109' bear against the shoulders '90 and conse quently cause the platen roller to press against the platen plate. j A'friction roller 118 is carried by the carriage and, is positioned parallel to the platen roller 64 with which it'isnormally in engagement. The friction roller 118 is rotatably mounted on axial pins 122 connected with the intermediate plates 54 as shown in FigureB.

Apair of guide plates 124 and 126 are positioned between the intermediate plates 54 with which they are connected, and have their ends 128 and 130 respectively disposed in spaced relationship and adjacent the platen roller 64 and the friction roller 118, as shown in Figures 3 and 7. The guide plate 126 is disposed in an inclined position with respect to the carriage. I A copy sheet moistening means comprises an elongated wick retaining casing 132 which extends between thejintermediate plates 54 and "is positioned beneath the friction roller 118,

A pair of casing supporting members 134 are fixedly connectedwith the ends of the casingf132 and are provided with recesses 1 36 therein'for receiving pins 138 connected with the intermediate plates154, for pivotally connecting the end members 134, and thecasing 132 carried thereby, with the intermediate plates. v The top ends of the members 134 are yieldingly connected with the intermediate plates by means of springs 140." L n v p The members134 are'provided with downward- 1y extendin POrtions 142 which engage the top surface of the bed plate 22. v v v A wick or absorbent member 144 is disposed in the casing 132 from which it projects andextends substantially the length of the platen roller.

It will be noted that the springs 140 and the extending portions 142 retain the members 134 in pivotal connection with the pins 138 and tend to move the wick 144 into engagement with the platen roller 64. i v e v V A liquid supply tank 146 is connected with the guide plate 126 on the lower side thereof. A pipe 148 is connected with the tank 146 and the casing 132 for providing communication therebetween, whereby a liquid disposed in the tank may flow to thecasing 132 for moistening the wick 14 4. The pipe 148 may be provided with a valve 150 for regulating the flow of liquid therethrough.

It will be noted on referring to Figures land 7 that cam tracks 152 are mounted on the be d plate 22, and are positioned for engaging ithe extending portion's142 as the carriage approaches its position at the extreme left of the'base, thereby'rotate ing the members 134 on the pins 138 for moving the wick 144 out of engagement with the platen roller 64. e r

Means for automatically removing the copy sheetfrom the'master sheet subsequent to the printing of 'the copy sheet, comprises a sheet engaging strip 120 which is connected-with the easing 132 'on the lower side thereof and extends substantially thelength of the platen roller.

The stop member 101 is positioned so that when the carriage is moved to the extreme right. for engagement with the stop 101, the end 155 of the copy sheet will rest on the strip 120. Asthe carriage is again moved to its normal position at the left,'the cam arms lift the platen roller and the strip 120 moves the copy sheet from the master'sheet as the carriage is moved.

As shown in Figures 1, 3 and 8 a drawer 164 may be disposed in the base 10 and slidably connected with the sides 14 by any suitable means such as channel members166.

From the foregoing description of the structure of my device the operation thereof may be readily understood. it

When it is desired to make a number of printed copies or duplicates of an original, a master sheet 154 is first provided, in the manner previously stated herein, which has the characters it is desired toduplicate delineated thereon in copying ink and reversely positioned.

The carriage 50 is then moved to'its extreme right positionwith respect to the base 10 when viewed as in Figures 1 and 3.

The retaining plate 36 is then moved for enabling the operator to position the top edge of the master sheet154 between the ends 38 and 40 of the platen'plate 26 and the retaining plate 36 respectively. The retaining plate is then released for gripping the master sheet between the ends 38 and40. v

i The master sheet is then positioned fiat on the platen plate, after which the retaining strip 32 is moved over the bottom end of the master sheet as shown in Figure '1.

The carriage is then moved toward its extreme left position during which time the platen roller 64 is disposed in its uppermost position so that it will pass over the master sheet without engaging the same. When the carriage is disposed in its extreme left position the latch arm 94 lockingly engages the lug 98, the downwardly extending portions 142 of the members 134 engage the cam tracks 152 for retaining the Wick 144 out of engagement with the platen roller 64, and the platen roller 64 .4 is moved into engagement with the platen plate 26 by means of the lever arms 82 engaging the lugs 92, and the projecting elements 86 engaging the'shoulders 90. V A copy sheet,not shown, is then positioned on the guideplate 126 so that the top .endportion thereof extends between the ends 128 and 130 of the guide plates 124 and 126, respectively, and engages the platen roller 64 and the friction roller 118. 3A- guide element 156 is adjustably connected .with the guide plate 126 by means of a set screw 158 :for properly positioning the copy sheet latterally with respect to the master sheet.

The handle 102 is then moved to the right in Figures 1 and 4, thereby causing the latch arm 94 to "disengagethe lug 98 and beginning the movement of the carriage toward the right end of the base.

As the carriage moves to the right the copy sheet is drawn between the platen roller 64 and with which it is positioned substantially parallel.

As the top edge of the copy sheet movesbelow the wick 144, the members 134 move out of engagement with the cam tracks 152 thereby permitting the springs 140 to move the wick 144 into engagement with the lower surface of the copy sheet thereby causing the sheet to be moistened.

As the carriage continues its movement to the right, the platen roller 64 presses the moistened surface of the copy sheet into engagement with the master sheet and the characters in reverse delineated thereon, thereby causing the characters to be transferred to the copy sheet.

It will be noted that the actuation ofthe handle for moving the carriage to the right causes a wedging action between the cam elements 109 and the shoulders 90. This wedging action enables the platen roller to exert suificient pressure on the copy sheets to cause the characters on the master sheet to be duplicated on the copy sheets,

As shown in Figure 3, the sheet retaining plate 36 is provided with a recess 37 extending along the end 38 thereof.

It will be noted that when the carriage is being moved to the right the platen roller first moves into the recess 37 and subsequently up over the end 40 of the platen plate 26. When the platen roller moves into the recess, the arms 68 move downwardly and the cam elements 109 also are moved downwardly by the handle, for engaging the shoulders'90 of the arms 68. When the platen roller, however, moves up over the end 40 of the platen plate, it will exert the maximum pressure against the copy sheet, due to the increased wedging action between the cam elements 109 and the shoulders 90.

Thus sufficient pressure is exerted by the platen roller against the copy sheet to cause the master sheet to positively print the copy sheet with clean out characters.

As the carriage terminates its movement to the right, it engages the stop member 101 and the copy sheet engages the strip 120.

As the handle is moved to the left preparatory to moving the carriage, the cam elements 109 are moved out of engagement with the shoulders90. Then as the carriage is moved, the platen roller is moved away from the copy sheet and the copy ieet is moved out of engagement with the master sheet by the strip 120.

While I have illustrated and described an embodiment of my invention, it will be understood that modifications may be made without departing from the spirit of the invention, and I therefore desire to be limited only by the prior art and the scope of the appended claims.

I claim:

1. A duplicating machine comprising a bed for holding a printing sheet, a carriage reciprocable over said bed, a platen roller having arms for swingably securing the roller to said carriage for movement intoand out of operative position, means acting on said arms for moving said roller into feeding relation with a copy sheet for laying and pressing the same on said printing sheet during the movement of said carriage in one direction, means for applying moisture to said copy sheet as the same is moved into printing position, means for retracting said moistener when said sheet has been moistened, means carried by said arms for elevating said roller from contact with said copy sheet upon initial movement of said carriage in the oppositedirection,

and a stripper engaging said copy sheet for removing the same longitudinally from said printing sheet upon movement of said carriage in said last mentioned direction.

2. A duplicating machine comprising a base having a platen bed, a carriage reciprocable over said bed, a presser roller provided with arms 0 pivotally secured to said carriage, whereby said roller can be moved to and from operative relation with said bed, a spring tending to retain said roller against movement from oneposition to the other, means cooperating with said spring automatically elevating said roller to inoperative position for retention therein by said spring upon initial movement of said carriage in one direction, and means cooperable with said spring upon the completion of the movement of the carriage in said direction to lower said roller to operative position.

3. A duplicating machine comprising a base having a platen bed, a carriage reciprocable over said bed, a presser' roller provided with arms pivotally secured to said carriage whereby said roller can be moved into operative relation with respect to said bed during movement of the carriage in one direction and into inoperative position upon the return movement of said carriage, means for elevating said roller upon initial movement of said carriage in said last mentioned direction, means for lowering said roller to operative position upon the completion of said return movement, means automatically locking said carriage in said last mentioned position, a pivotally mounted handle carried by said carriage for reciprocating the latter, and means operable by said handle for releasing said locking means and simultaneously locking said roller in said operative position. I

4. A duplicating machine comprising a bed, means for mounting a printing sheet on the bed, a reciprocable carriage movable thereover, a roller having pivotal supporting means for securing the same to said carriage, said roller being adapted to move a second sheet into engagement with a printing sheet on said bed for printing the second sheet whenthe carriage is moved in one direction, and means carried by said supporting means and engaging said bed for automatically moving the roller away from the second sheet upon initial movement of said carriage in the opposite direction.

5. A duplicating machine comprising a bed, means for mounting a printing sheet on the bed, a reciprocable carriage movable thereover, a roller having pivotal supporting means for securing the same to said carriage, means cooperating with said supporting means for automatically moving the roller into contact with said bed upon return of said carriage to paper feeding position, means cooperating with said roller for feeding a second sheet into contact with said printing sheet as said carriage is moved in one direction, and means cooperating with said supporting means for automatically moving said roller out of contact with said second sheet upon initial movement of said carriage in the opposite direction.

6. A duplicating machine comprising a bed, means for mounting a printing sheet on the bed, a re'ciprocable carriage movable thereover, a pair of arms carried by the carriage, a roller carried by said arms and movable over the bed for press- 7 ing a second sheet into contact with said printing sheet as said carriage is movedin one direction, and means connected with one of said arms and cooperating with said bed for moving the roller out of contact with said second sheet upon initial 1 movement of said carriage in the opposite direction.

7. A duplicating machine comprising a bed, means for mounting a printing sheet on the bed, a reciprocable carriage movable thereover, a pair of arms pivotally connected by the carriage and positioned on opposite sides of the bed, a roller carried by said arms, means operatively associated with said arms and said bed for moving said roller into contact with the bed upon completion of the passage of said carriage in one direction, means cooperating with said roller for moving a second sheet into engagement with said printing sheet as said carriage is moved in the opposite direction, a pivotally mounted handle connected with the carriage for reciprocating the same, and cam means operable by said handle into engagement with said arms for locking said ment of said carriage in one direction, movable means for moistening said copy sheet during the transfer of the same to said printing sheet, and means for automatically moving the moistening means away from said platen roller upon completion of the transfer of said copy sheet to said printing sheet.

HAROLD S. BRAAM.

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