US1717865A - Hectograph duplicating machine - Google Patents

Description

June 18, 1929. v w, w s 1,717.865

HECTOGRAPH DUPLICATING MACHINE Filed March 1928 5 Sheets-Sheet June 18, 1929- w. E. WILLIAMS HEQTOGRAPH DUPLICATING' MACHINE Fi led March 5. 1928 3 Sheets-Sheet 2 June 18, 1929. w. E. WILLIAMS 1,717,865

HECTOGRAPH DUPLICATING MACHINE I Filed March 1928 3 Sheets-Sheet 3 M g wunw Patented June 18, 1929.

UNITED STATES 1,217,855 PATENT OFFICE.

WILLIAM ERASTUS WILLIAMS, OF WILMETTE, ILLINOIS, ASSIGNOR 'lO DITTO, IN-

CORPORATED, OF CHICAGO, ILLINOIS, A

CORPORATION OF WEST VIRGINIA.

HECTOGRAPH DUPLICATING MACHINE.

Application filed March 3,

My invention relates to that class of machines wherein a hectograph gelatimzed pad in the form of a sheet is trained from one spindle at one end of an impression bed to and over an impression bed and to and upon a rewinding spindle at the other end of the bed and copies are made by laying down the master copy on the impression bed and then by an impression carriage taking off dupl cate copies on the well known hectograph pr1nc1- The object of my invention is to improve the detailed construction of the impression carriage and platen roll arrangement in laying down the master and other cop es in an exact definite position of registration so that all copies will register with one another, a feature that is necessary in the commercial use of certain classes of work for which these machines are used. The particular object involved in this invention is the means of registering the copy by the mechanism employed in the impression carriage.

As this invention relates to details of the machine only, only so much of the machine is shown as is necessary to illustrate the peculiar features involved in this invention, the rest of the machine being old and in common use.

Reference will be had to the accompanying drawings in which Fig. l is an end elevation partly in section on line 11 of Fig. 2.

Fig. 2 is a. plan view of the right front cor ner of the machine showing the essential parts of my invention.

Fig. 3 is a sectional elevation on line 3-3 of 2.

Fig. 4 an elevation on the same line as that of Fig. 3 but showing the impression or platen roll in a raised position Whereat the paper is inserted ready for an operation.

Fig. 5 is a similar view to that of Fig. 4 showing a position of the platen roll when down.

Fig. 6 is a similar view to that of Fig. 5 but showing the parts in position after the impression carriage is moved forward in laying down the copy.

Fig. 7 is an end elevation to be described later on line 7*? of Fig. 5.

Fig. 8 is a similar view to that of Fig. 7 on line 88 of Fig. 6 but showing the position of the parts as shown in Fig. 6.

In the drawings 1 indicates the frame of the machine being the right front end thereof and 2 indicates the impression bed over which 1928. Serial No. 258,837.

the gelatinized pad 3 is trained. 4 indicates one of the spindles upon which the gelatin pad is wound. An impression carriage the frame of which is indicated by 5 is connected to a block 6 sliding on a bar 7 mounted on the side of the machine (see Fig. 2).

This bar 7 through the medium of the block 6 directs the travel of the carriage out and back over the impression bed. Mounted in the impression carriage frame there is a yoke 8 hinged upon the rod 9 in the frame of the carriage and moved in a rocking motion by the hand lever 10. At the ends of the yoke 8 there are arms 11 into which is mounted the shaft 12 of a rubber-faced impression or platen roll 13 which is raised and lowered by the rocking of the yoke 8. Fixed in the im pression carriage frame there is a paper guide 1 1- which is provided with end flanges 15. A lateral guide (not shown) is provided for adjusting the paper sidewise on guide 14. These guides direct the paper 16 down to and in contact with the margin bar 17 (see Fig. 4) Mounted also in the carriage frame there is a compression or clamping roller 18 journaled at its ends in little blocks 19 hinged at 20 inthe carriage frame. The clamping or compression roller 18 is automatically pushed toward a platen roll 13 by little springs 21 and this movement is arrested at the right position by little pins 22 hitting a projection 23 on the impression carriage frame (see Fig. 3). Thus the clamping or'compression roll 22 is always under the control of the springs 21 save only when the said roll is locked or held back by a lever mechanism now to be described.

At each end of the compression roll 18 there is connected to the blocks 19 short links 2 1 hinged at 25 to levers 26 fixed on the shaft 27 mounted to the carriage frame. The lever 26 at the left end of the carriage which is not shown extends only from the hinge pin 25 to the shaft 27, the shaft 27 extending entirely across the carriage, while the lever at the right end of the machine has an upward extending arm 28 hinged at 29 to a peculiarly shaped link 30 which is provided with a slot 31 engaged by a pin 32 in a little angle block 33 fixed by screws 34 to the aforementioned yoke 8 (see Fig. 4).

Thus, as the yoke is rocked backward from the position of Figs. 1, 3 or 6 the pin 32 moving with the yoke 8 pulls the link 30 backward to the position indicated by Fig. 4 and then on a slight further movement causes the link to drop down to the position of Fig. 5 wherein a projection on the link 30 drops in behind a projection 36 of a lever arm 37 which lever arm 37 is hinged to the carriage frame 38 and drops by gravity to the posi tion shown by Fig. 5 and in this position of Fig. 5 the link 30 connected to the lever 28 controls the movement of the shaft 27 to hold the compression or clamping roll 1.8 hack and away from the impression roll 13 as shown by the positions of Figs. 4 and 5 and while the compression roll 18 is held backward in this position, the yoke 8 is moved downward bringing the platen roll 13 from the position of Fig. 1 to that of Fig. 5. Then on the forward movement of the carriage from the position of Fig. 5 to the position of Fig. 6 the lever arm 37 through the medium of a block 39 hinged to the said arm 37 at to engages a round pin 11 best observed in Fig. 2 which pin ll lifts the projections 36 over and above the projection 35 which releases, as it were, the link 30 that allows the springs 21 to press the compression roll 18 up in contact with the platen roll 13 as indicated by Fig. 6 and hold the paper snug to the roll for the purpose of withdrawing the paper from the gelatin pad on the return movement of the carriage. Then when the carriage returns the block 39 revolves over the projection 4.1 and permits the relocking of the link at) on the lifting of the platen roll 13 by the yoke 8 for a new action of the machine. The margin bar 17 is connected to links 42 hinged at 4:3 to the frame of the machine.

Thus, when the paper is inserted onto the margin bar 17 the compression roll 18 is free away from the platen roll 13 and the paper is permitted to sink or be pressed down onto the gelatin pad without interference by the compression roll 18 and thus the paper automatically, as it were, remains in registration against the margin bar 17 which would not be the case were the impression roll in position to be contacted with the paper and the platen roll when the platen roll descends for in that case the frictional contact of the platen roll with the compression roll revolves the platen roll slightly and withdraws and disturbs the register of the paper with the margin bar 17. This error varies with the character and thickness of the paper but by holding the compression roll away from the platen roll free and clear during the period of registering the paper in the first contact with the gelatin pad, then the registration is not disturbed by the coming of the contact of the compression roll 18 to the paper and holding it to the rubber faced platen roll 13.

The function of the compression or clamping roll18 is in withdrawing the paper from the gelatin pad and not in laying it down and thus only on the return stroke of the carriage is it necessary to have the compression or clamping roll 18 in contact with the platen roll 13. This contact automatically takes place on the slight movement forward of the carriage, after the paper is laid down as shown by Fig. 5 the distance being only that distance between the position of the block 39 from the pin 4.1 which pin ll is substantially on the center of the hinge pins 43 of the arm 42 which supports the margin bar 17.

Thus by the simple mechanism of holding back the compression roll free and away from the platen roll during the registering of the paper and then allowing this roll to come in contact with the platen roll after registration is made, the full and complete function of the machine is arrived at without other means for securing the registration of the paper in the desired position on the gelatin pad.

What I claim is 2 1. In a machine of the class described, a bed, a carriage mounted to be moved backward and forward over the bed, a yoke mounted in the said carriage on a hinge pin axis, a platen roll mounted in the said carriage and adapted to be swung to and from the said bed, a compression roll. adapted to clamp paper to the said platen roll when the said platen roll is down in relation to the said bed, spring means for clamping the said compression roll to the said platen roll, means for locking the said compression roll free and. clear of said platen roll, and said locking means engaged by the movement of the said yoke, means fixed to the bed of the machine for disengaging the said locking means as the said carriage is moved outward from registering'position of the said carriage.

2. In a machine of the class described, a bed, an impression carriage mounted to travel forward and backward over the said bed,.a platen roll mounted in the said carriage in a manner to be raised and lowered in relation to the said bed, a compression roll adapted to clamp paper to the said platen roll when the latter is down in the function of laying the paper on and taking it off from the said bed, spring means for holding the said compression roll in connection with the said platen roll, a locking device for looking thesaid compression roll in a position backward and away from the said platen roll and said locking device engaged by the upward movement of the platen roll and disengaged by the forward movement of the carriage.

3. In a machine of the class described,.a bed, an impression carriage mounted to travel backward and forward over the said bed in applying paper thereon and withdrawing it therefrom, a platen roll mounted to be raised and lowered in the said carriage fro-m and to the said impression bed, a compression roll adapted to clamp paper to the said platen roll and said compression roll mounted in the said carriage to move to and from the said platen roll, a rocker shaft extending across the said carriage and supplied with lever arms connected by links to control the movement of the said compression roll, a link connection from the said rocker shaft to the mounting of the said platen roll whereby on the raising of the platen roll, the said compression roll is moved backward and away from the region of the said platen roll and locking means for holding the said rocker shaft to hold the said compression roll in the said position away from the said platen roll.

4. In a machine of the class described, an impression bed, an impression carriage mounted to move backward and forward over the said bed, a yoke hinged in the said carriage and adapted to be rocked in a vibrating movement, a platen roll carried by the said yoke, a compression roll jonrnaled in arms hinged in the said carriage and adapted to be swung to and from contact with the said platen roll and held in engagement therewith by means of a spring tension, a rocker shaft mounted across the said carriage and provided with arms connected by links to move the said compression roll, a link connection between the said rocker shaft and the said yoke whereby on the lifting of the said platen roll by the said yoke the said compression roll is moved away from the said platen roll, means for locking the said rocker shaft in position to hold the said compression roll away from the said platen roll and means for disengaging the said locking mechanism and this disengaging means fixed to the bed frame of the machine and adapted to unlock the said locking means as the said compression carriage is moved forward away from the registering position of the said carriage.

5. In a machine of the class described, an impression bed, an impression carriage mounted to be moved forward and backward over the bed in laying paper down thereon and withdrawing it therefrom, a yoke hin 'ed in the said carriage, a platen roll mounted in the said yoke and adapted to be raised and lowered through the medium of the said yoke in relation to the bed, a compression roll mounted in the said carriage and adapted to be swung to and from the position of the said platen roll when the latter is down, a rocker shaft connected to draw the said compression roll to hold it away from the said platen roll and springs adapted to compress the said said rocker shafts to the said yoke, a locking means adapted to engage the said link connection and hold it to a given position and said locking means hinged to the said carriage and provided with a contact member adapted to engage a projection on the said bed in the forward movement of the carriage and ride over the said projection on the backward movement of the carriage.

6; In a machine of the class described, a bed, an impression carriage mounted to be moved outward and back over the said bed, a yoke mounted in the said carriage and a platen roll mounted in the said yoke and adapted to be raised and lowered by means of the said yoke in relation to the said bed, a compression roll mounted in the said carriage and adapted to clamp or compress paper to the said platen roll when thelatter is down in service on the said bed, spring means for actuating the said compression roll in clamping the paper to the said platen roll, a rocker shaft hinged in the said carriage and connected by links to the said compression roll mounting in a manner that the rocking of the rocker shaft withdraws the said compression roll from the said platen roll and compresses the said springs which actuate the said compression roll, a link connection connecting the said rocker shaft with the said yoke and said link connection being provided with a slotted link whereby on the raising of the said platen roll through the medium of the said yoke the said compression roll will be moved away from the said platen roll, locking means for holding the said rocker shaft to hold the said compression roll away from the said platen roll and the said slotted link connection permitting the said yoke to move the said platen roll down to service on the said bed without unlocking the said locking means and the said locking means unlocked by a projection on the bed as the carriage is moved forward in the service of laying on the paper.

Signed at Chicago, in the county of Cook and State of Illinois, this 28th day of February, 1928.

WILLIAM ERASTUS WILLIAMS.

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