US2215495A

US2215495A - Duplicating machine

Info

Publication number: US2215495A
Application number: US189783A
Authority: US
Inventors: Berman Sam
Original assignee: Individual
Current assignee: Individual
Priority date: 1938-02-10
Filing date: 1938-02-10
Publication date: 1940-09-24
Anticipated expiration: 1957-09-24

Description

Sept. 24, 1940. 5 BERMAN 2,215,495

DUPLIGATING MACHINE Filed Feb. 10, 1958 2 Sheets-Sheet 1 go J9 J5 Z7 19 VIII w H W I w .JCI 32 [I Q [I Q zz- I Sept. 24, 1940. s. BERMAN DUPLICATING MACHINE Filad Feb. 10, 1938 2 Sheets-Sheet 2 iii Patented Sept. 24, 1940 UNITED STATES PATENT OFFICE 9 Claims.

My invention relates to duplicating machines and particularly to the type of duplicating machine in which a design in the form of reading matter or otherwise to be duplicated is prepared in soluble ink on the face of a master sheet which is carried into impression relationship with a sheet of paper or other suitable surface to which the matter is to be transferred, the surface to which the transfer is to be made being moistened slightly by a very light application of a solvent thereto immediately before the impression is to be made, such solvent being of a type effective with the ink used for the preparation of the design on the master sheet. It is the object of my invention to provide in a machine of this type an improved form and arrangement of means for applying a thin film of the desired solvent upon the face of a sheet for receiving an impression, improved means for giving the required timed movement to the parts for enabling the operator conveniently to insert the sheets successively into efiective relation to the cooperating parts, improved means for mounting the pressure roller in cooperative relation to the drum upon which the master sheet is mounted, and improved means for mounting the master sheet on the drum so as to be carried around thereby and for holding such master sheet in operative position on the drum.

t is another object of my invention to provide an improved construction which is very simple in arrangement and operation so as to make it capable of production at a low cost and so as to enable it to be used to advantage by any ordinary unskilled worker with a minimum of instruction whereby the machine shall be made available for wide use, as for example by small restaurants for the preparation of their daily menu slips. To this end, it is one of the objects of my invention to provide a construction involving a minimum number of cooperating parts by which the desired results can be attained.

For the accomplishment of the purposes as above set forth, it is one of the objects of my invention to provide for the application of a film of solvent on the face of a sheet of paper or other suitable material by the use of an absorbent pad with which said sheet is brought into contact as it moves to the point of engagement with the master sheet, to provide means by which such pad is normally held so as to press on the surface along which the sheet is fed forward for the impression, and to provide means by which the pad is automatically moved out of the path of movement of the sheets in timed relation so that after one sheet'has cleared a new sheet may be readily inserted into the grip of the carrying devices for the next succeeding impression.

It is another object of my invention to improve machines of this type in sundry details hereinafter pointed out. The preferred means by which I have accomplished my several objects are illustrated in the drawings and are hereinafter specifically described. That which I believe to be new and desire to cover by Letters Patent is set forth in the claims.

In the drawings,

Fig. 1 is a top plan view of my improved machine, partly broken away at one point;

Fig.2 is a side elevational view of the machine shown in Fig. 1;

Fig. 3 is a vertical sectional view taken substantially-at the line 33 of Fig. 2;

Fig. 4 is an enlarged detail view, being a vertical section taken at the line 44 of Fig. 2;

Fig. 5 is a top plan view of one end portion of the drum of my machine, with certain of the parts omitted, and with the parts in changed position as compared with the showing of Fig. 1;

Fig. 6 is an enlarged detail view being substantially a sectional view taken at line B-6 of Fig. 1;

Fig. 7 is a view similar to a portion of Fig. 2 but showing the parts upon an enlarged scale and showing in dotted lines additional parts as compared with the showing of Fig. 2;

Fig. 8 is a top plan view of the end portion of one of the parts for mounting in position the absorbent pad as hereinafter described;

Fig. 9 is a vertical sectional view of certain of the parts as shown in Fig. 6 but with the parts separated for better showing their construction;

Fig. l0 is a diagrammatic View showing the relation of the parts at the time when the new sheet is being introduced into impression relationship to the master sheet; and

Fig. 11 is a vertical section view through one of the housings by which the pressure roller of my improved machine is mounted in position.

Referring now to the several figures of the drawings, in which corresponding parts are indicated by the same reference characters, 15 and I6 indicate frame members formed of sheet metal having inwardly turned flange portions H at their lower edge portions, the flanges I! being connected in the arrangement shown by cross bars 18, as best shown in Figs. 3 and 6. In the arrangement shown, suction cups [9 are provided below the flanges il serving as the means for supporting the frame upon a table. Cross bars and 2| are also provided as is clearly shown in said Figs. 3 and 6.

Between the frame standards l5 and I6, I have provided a drum 22, such drum in the arrangement shown comprising flanged end discs 23 and 24 stamped from sheet metal and secured upon opposite ends of a body portion 25 formed of sheet metal rolled into cylindrical form, the edge portions of the sheet metal 25 being in slightly spaced relation to each other so as to provide a longitudinally extending slot 26 leading to the interior of the drum. The drum in the arrangement shown is rigidly mounted in position upon a shaft 21 (see Fig. 6) which is journalled in the frame standards l5 and I5 for supporting the drum revolubly in position. Upon one end of the shaft 27, I have mounted a crank arm 28 having a handle 29 at its outer end so as to provide for the ready rotation of the drum 22.

As is best shown in Figs. 6 and 10, stop means is provided on the inside of the drum 22 opposite the slot 25. In the arrangement shown, this stop means is in the form of brackets of strap metal bent into V-formation, being preferably welded in position opposite the slot, one of such brackets being provided at each end of the drum. In the construction illustrated, the stop devices are indicated by the numerals 30. By the use of my arrangement as described, a master sheet 3| formed of paper or any other suitable sheet material can readily be inserted through the slot 25 into engagement with the stop devices 35 which serve for truing the master sheet in position with respect to the drum. When thereafter the drum 22 is driven in counterclockwise direction in Fig. 10 the sheet Si is wrapped about the drum so as to be carried around therewith. A cross bar 32 mounted upon the framework at the upper face of the drum serves to hold the master sheet 3| from unwrapping from the drum during the rotary movement thereof.

Below the drum 22, I have mounted a pressure roller 33 preferably having a body of rubber and mounted in position by means of a shaft 34. As

is best shown in Fig. 11, the shaft 34 is supported at its end portions by journal blocks 35 having notches in their upper ends for the reception of the shaft, such blocks 35 being slidably mounted in housings 35 formed of sheet metal and secured on the inner faces of the frame parts l5 and I6. Each of the housings 35 is bent into the form of a channel closed at its lower end, outwardly extending

flanges

37, 38 and 39 being provided along the sides and at the lower end for securing the housings rigidly in position, such housings being preferably spot-welded to the sheet metal frame members l5 and I5. Coiled springs 36a are mounted in the housings 35 below the journal blocks 25 serving to press the shaft 34 and the roller 33 strongly toward the drum 22.

At the rear end of the machine, I have provided a table 45 which in the arrangement shown is formed of sheet metal having its side edges turned downwardly in the form of flanges 4|. The table is secured in position by means of notches 42 formed in the ends of the flanges 4| so as to have snug engagement with the cross rod 25, and notches 43 in the lower edges of said flanges in such arrangement as to have effective engagement with the cross rod 2|, as is best shown in Fig. 6. The arrangement is such that the table when in position is very firmly held in position while at the same time the table is very readily removable when given the required tipping motion for clearing the notches 43 from the rod 2|. In the arrangement shown, a guide bar 44 is mounted along one side edge of the table, such guide bar being in the form of an angle formed from sheet metal as is best shown in Fig. 3. The guide bar 44 is adjustably mounted in position on the table 45 by means of a bolt 45 passing loosely through a lug 45 carried by the guide bar, and through a transverse slot 47 in the table into a screw-threaded nut 48 of any suitable type as is best shown in Fig. 2. A lug 49 carried by the guide bar 44 engages the slot 4'! for assisting in holding the guide bar in normal position with respect to the table.

As is best shown in Fig. 6, I have provided an absorbent pad 55 of any suitable material which is movably mounted in position above the table 45. The mounting means for the pad 50 in the arrangement shown comprises a sheet metal plate 5| of a length for having a working fit between the frame members I5 and 16, being pivotally mounted between said frame members by means of pivot pins 52 extending from opposite ends of the plate. In the construction illustrated, the plate 5| is provided with an upstanding flange 53 at the rear edge of the plate, the flange 53 and the plate 5| being reinforced with respect to each other by end plates 54 connected with said parts. The pad 55 is of greater width than the plate 5|, being mounted on the bottom face of said plate with its rear edge portion extending backwardly beyond the flange 53, as is best shown in Fig. 6. The pad is mounted in position upon the bottom face of the plate 5| by means of pins 55 carried by a plate 55 located below the pad, such pins 55 being positioned so as to extend through openings 51 through the pad and openings. 58 in the plate 5|, such pins having nuts 59 mounted by means of screw threads on their upper ends for holding the plate 56 and the pad 55 removably in position wtih respect to the plate 5!. The plate 55 is provided with a flange 69 at its rear edge so as to extend upwardly along the rear edge face of the pad 50, and is provided with end plate portions 6| connected with the plate and with the flange 60 so as to partially enclose the pad 50. Coiled springs 65. are connected at their rear ends with the end plates 54 and at their forward ends with brackets 63 carried by the frame members I 5 and I6, serving to hold the front edge of the pad 60 normally in position to engage the top face of the table 45.

The arrangement of the pad 55 and its mounting means is such that the rear edge portion of the pad is accessible through the opening between the flanges 53 and 50 so as to enable the operator to apply a suitable solvent to the pad. The plate 56 and its flanges are so arranged as to assist in the control of the solvent as it is applied to the absorbent pad. The plate 55 is normally held by the springs 52 in backwardly inclined position so that the solvent applied to the rear edge portion of the pad has a tendency to travel forwardly and downwardly to the front edge of the pad for material in position on the table 40.

Means is provided for giving the plate 5| a pivotal movement about the pivot pins 52 against the action of the springs 52. This means comprises a pin 64 carried by the flange 53 and ertending through a slot 65 in the frame member I6, such slot 65 being in the form of an arc about the axis of the pivot pins 52. Upon its outer end, the pin 64 is provided with a roller 66 which is normally held in position in the path of a cam 6'! carried by the crank arm 28. The arrangement is such that at one point in each complete revolution of the crank handle 28 the cam 61 is brought into engagement with the roller 66 so as to displace such roller forwardly and application to a sheet of i" Fig. 6. When the cam 61 is brought into operative engagement with the roller 66, the pad is moved to the changed position as shown in dotted lines in Fig. 7 so as to be in spaced relation to the table A0. With the pad in the position as shown in said Fig. 7 the operator is enabled to slide a sheet of paper forwardly along the table 40 toward the right in said Fig. 7 into the bite of the drum 22 and the roller 33.

Stop means is provided adapted normally to stop the rotary movement of the crank arm 28 at the time when the pad is standing in position as shown in Fig. '7. This means comprises a stop block 68 mounted in position by means of a screw 69 upon the outer face of the frame member l6, as is clearly shown in Fig. 4. The stop 68 is in position to be engaged by a spring pressed member 10 carried by the handle 29 of thecrank arm 28. The arrangement is such that when the spring pressed member 10 engages the block 68 the crank arm is normally stopped in the position as shown in Fig. 5, the continued rotary movement of the crank arm being possible only by the application of pressure to the arm sufficient for causing the spring pressed detent I0 to be retracted for clearing the block 68.

In Fig. 10, I have shown the parts more or less diagrammatically in the positions which they occupy at the time when the pad is in raised position as shown in Fig. '7 and in which the detent 10 is in engagement with the block 68 as shown in Fig. 5.

When a master sheet 3| having a design formed of soluble ink upon its outer face is mounted in position on the drum 22 as shown in Fig. 10 so as to be carried around by the drum in counter-clockwise direction in said figure by power applied through the crank arm 28, when the crank arm 28 reaches the point as illustrated in Fig. 5 so as to hold the pad 50 in its raised position and so as to cause the spring pressed detent 10 to engage the block 68, the crank arm 28 s normally stopped except as additional power is applied thereto beyond the normal power required for carrying it to such critical position. When the drum is stopped in the position as shown in Fig. 10, the operator places a sheet of paper II in position upon the table 40 and presses such sheet forward so as to bring its front edge into engagement between the master sheet 3| and the roller 33.' Additional pressure is then applied upon the crank arm 28 so as to cause the detent to be retracted for permitting the arm to pass the block 68 for further rotation of the drum 22 in counter-clockwise direction. Upon such renewed rotation of the drum, the sheet H is carried forward by the drum and roller so as to have an effective impression relationship with the master sheet 3!. As soon as the crank 28 passes the critical point as shown in Fig. 5 corresponding to the position of the parts as shown in Fig. 10, the springs 62 serve to return the absorbent pad 58 to the position as shown in Fig. 6, with its forward edge portion in engagement with the top face of the sheet H. Upon the subsequent forward movement of the sheet H toward the right in Fig. 10 as carried ahead by the drum and the roller, a thin film of the solvent carried by the pad 50 is deposited upon the top face of the sheet, such film being applied at a point adjacent to that at which the effective impression takes place, as shown in Fig. 6. As the sheet I! is carried forward under the master sheet, the solvent carried by said sheet H serves to soften the ink of the design on the master sheet and a copy of the design is transferred to said sheet H. In the forward movement of ,the sheet 'Il beyond the roller 33, its leading edge is directed so as to pass over a cross bar I2, as shown in Fig. 6, such cross bar 12 serving to support the sheet H so as to cause the sheet when released by the drum and roller to slide normally into a suitable tray 13 removably supported in position. As soon as the lever 28 again reaches the critical position as shown in Fig. 5, the arm 28 is normally brought again to a stop, ready for the insertion of the next succeeding sheet for a new impression operation.

It will be understood that the design on the master sheet 3| formed of soluble ink may be ap- I plied to said sheet in any suitable manner, being preferably applied by the use of a hectograph carbon or the like, and being of any desired color or combination of colors. For the preparation of a master sheet comprising a design in the form of ordinary handwritten matter, it is only necessary that the carbon paper be faced toward the paper so as to produce a reversed design which is again reversed to normal condition by the impression operation.

While I prefer to employ the form of arrangement as shown in my drawings and as above described, it is to be understood that my invention is not to be limited to the arrangement shown except so far as the claims may be so limited, it being understood that changes in the formand arrangement might well be made without departing from the spirit of my invention.

I claim:

1. In a duplicating machine, the combination of means for mechanically gripping a sheet of material when fed edgewise thereto and crank operated means for forwarding said sheet in impression relationship with respect to a design prepared from soluble ink and carried by the forwarding means, a table adjacent to said forwarding means adapted to support a sheet in feeding position, an absorbent pad, means for movably supporting said pad adjacent to the face of said table so as to engage the face of a sheet on the table or to be moved alternatively in the direction away from the table, yielding means adapted normally to press the pad toward the face of the table, and means carried by the crank and adapted automatically at timed intervals in the operation of the machine to engage said pad supporting means and to give said pad a movement in the direction away from the table for permitting the insertion of a sheet of material between the pad and the table.

2. In a duplicating machine, the combination of means for mechanically gripping a sheet of material when fed edgewise thereto and for forwarding said sheet in impression relationship 1 with respect to a design prepared from soluble ink and carried by the forwarding means, a table "adjacent to said forwarding means adapted to support a sheet in feeding position, an absorbent pad, means for movably supporting said pad adjacent to the face of said table so as to engage the face of a sheet on the table or to be moved alternatively in the direction away from the table, yielding means adapted normally to press the pad toward the face of the table, a manually operated arm mounted so as to make a single complete revolution for each complete cycle of the movement of said gripping and forwarding means through an impression operation, and means movable with said pad supporting means actuated by direct engagement with said arm at each revolution thereof for giving said pad a movement in the direction away from the table for permitting the insertion of a sheet of material between the pad and the table into position to be gripped in proper timed relation for an operative impression movement.

3. In a duplicating machine, the combination of a drum rotatably mounted in position and arranged for carrying a design of soluble ink on its face, a roller rotatably mounted in impression relationship to said drum, a table adjacent to said drum adapted to support a sheet in feeding position between the drum and the roller, an absorbent pad, means for movably supporting said pad adjacent to the face of the table so as to engage the face of a sheet on the table or to be moved alternatively in the direction away from the table, yielding means adapted normally to press the pad toward the face of the table, a manually operated crank arm for rotating said drum, and means movable with said pad supporting means actuated by direct engagement with said crank arm at each revolution thereof for giving said pad a movement away from the table for permitting the insertion of a sheet of material between the pad and the table into the bite of said drum and roller for an operative impression movement.

4. In a duplicating machine, the combination of means for mechanically gripping a sheet of material when fed edgewise thereto and for forwarding said sheet in impression relationship with respect to a design prepared from soluble ink and carried by the forwarding means, a table adjacent to said forwarding means adapted to support a sheet in feeding position, an absorbent pad, means for movably supporting said pad adjacent to the face of said table so as to engage the face of a sheet on the table or to be moved alternatively in the direction away from the table, yielding means adapted normally to press the pad toward the face of the table, means for driving said gripping and forwarding means including a manually operated crank, means movable with said pad supporting means actuated by a cam on said crank for giving said pad a movement in the direction away from the table for permitting the insertion of a sheet of material between the pad and the table into position to be gripped when the parts reach the point at which a new sheet is to be inserted, and stop means coacting with said crank adapted normally to stop the movement of the crank at the point of the operation at which said pad is held away from the table for the insertion of a new sheet and adapted upon further turning of the crank to release yieldingly for permitting continued movement of the parts through the next succeeding impression operation.

5. In a duplicating machine the combination of means for mechanically gripping a sheet of material when fed edgewise thereto and for forwarding said sheet in impression relationship with respect to a design prepared from soluble ink and carried by the forwarding means, a table adjacent to said forwarding means adapted to support a sheet in feeding position, an absorbent pad, means for movably supporting said pad adjacent to the face of said table so as to engage the face of a sheet on the table or to be moved alternatively in the direction away from the table, yielding means adapted normally to press the pad toward the face of the table, a manually operated arm mounted so as to make a single complete revolution for each complete cycle of the movement of said gripping and forwarding means through an impression operation, means movable with said pad supporting means actuated by direct engagement with said arm at each revolution thereof for giving said pad a movement in the direction away from the table for permitting the insertion of a sheet of material between the pad and the table into position to be gripped in proper timed relation for an operative impression movement, and stop means adapted normally by direct engagement with said arm to stop the movement of the arm and the gripping and forwarding means when they reach the point at which a new sheet is to be inserted and adapted upon the application of increased power to release yieldingly for permitting continued movement of the parts through the next succeeding impression operation.

6. In a duplicating machine, the combination of a frame, a drum rotatably mounted on said frame and arranged for carrying around thereon a sheet of paper wrapped thereabout and having on its face a design formed of soluble ink, and means cooperating with said drum for carrying a piece of sheet material past the drum in impression relationship therewith so as to transfer a copy of the design from the drum to the face of said sheet comprising housing members formed of sheet metal stamped into the form of channels closed at their lower ends and having outwardly extending flanges along their sides and at the end for securing the members in position on the inner faces of the frame parts at opposite ends of the machine, coiled springs in said housings, journal blocks slidably mounted in said housings and bearing against said springs respectively, a shaft revolubly mounted in grooves formed in the top faces of said journal blocks and extending through slots in the adjacent frame parts, and a roller mounted on said shaft between said journal blocks and pressed by said springs strongly against the face of said drum.

'7. In a duplicating machine, the combination of a plate, pin means rising from said plate, an absorbent pad having apertures to receive said pin means and extending beyond said plate for moistening a sheet fed thereunder, and means cooperating with said pin mens for pressing said pad firmly against said plate.

8. In a duplicating machine, the combination of a plate, pin means rising from said plate, an absorbent pad mounted on said pin means, flanges at the back and at the ends of said plate for partially enclosing said pad for assisting in the application of a liquid solvent to the pad, and means cooperating with said pin means for pressing said pad firmly against said plate.

9. In a duplicating machine, the combination of a plate, an absorbent pad positioned on the bottom face of said plate and extending backwardly beyond the edge of the plate, a second plate positioned on the bottom face of said pad, pins carried by said second plate and extending through openings in the pad and the first mentioned plate, and means cooperating with said pins for connecting the pad and the second plate removably with said first named plate, and flanges at the back and at the ends of said second plate for partially enclosing said pad for assisting in the application of a liquid solvent to the pad.

SAM BERMAN.