US1824200A - Printing machine - Google Patents

Description

Sept. 22, 1931. w. K. ECKHARD PRINTING MACHINE Filed July 11. 1929 2 Sheets-Sheet 1 JKQQMM W Sept 22, 1931. w. K. ECKHARD PRINTING MACHINE Filed July 11, 1929 2 Sheets-Sheet 2 a W .w 0 r T A N X W 1 E wfl V A m 2:3 P 1? 3 m 1 a Q Q l lmlllmmu m MWII WI IINQ 1 1.

Patented Sept. 22, 1931 UNITED STATES PATENT OFFICE VTELLIAM K. ECKHAIRD, OF DUNELLEN, JERSEY, ASSIGNOR TO It. HOE &, (10., INC.,

OF NEW YORK, N. Y., A COB-YORATION OF NEW YORK 1 PRINTING MACHINE Application filed July 11,

that is moved back and forth under an inking mechanism and an impression member, whereby the plate is inked and the design then imprinted on a sheet. It is particularly applicable to presses usedin printing from engraved or other printing plates in which the design is in intaglio, and which are first inked and then wiped to remove the ink from the high portions of the plate.

The especial object of the invention is to provide a mechanism that will operate the bed carrying the plate so that the latter will be acted upon successively by inking, wiping and impression members, only in the proper sequence and without tripping, or otherwise moving the inking or wiping mechanisms from their operating positions.

Another object of the invention is to provide a bed operating mechanism that will move and guide the bed forward on one plane and backward on another plane. I

Another object of the invention is to provide a simple mechanism for guiding the bed and supporting the chain by means of which it is driven.

It is also an object of the invention. to provide a bed operating mechanism of generally improved construction, whereby the mechanism will be simple, durable and inexpensive in construction, as well as practical and efficient in its use.

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts, and in the details of construction hereinafter described and claimed, it being understood that various changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed without departing from the spirit of the invention.

Figure 1 is a diagrammatic side view of a printing press embodying the invention and showing the bed in the position it occupies just before it is moved forward to print a sheet; 7

Figure 2 is a similar view, showing the bed in the position it occupies just after the sheet 1929. Serial No. 377,570.

has been printed and is being carried toward the delivery end of the machine;

F gure 3 is a fragmentary view partly. in section, showing a'portion of the bed and its guiding and operating mechanism as viewed Figure 5 is a fragmentary view partly in section, showing the mechanism for raising and lowermg the tracks along which the bed is moved, as viewed on the line 55 of Fig-- ure 2.

Referring to the drawings, 11 and 11 indicate side frames of the machine to which various elements are suitably attached. An inking mechanlsm includes an 111k fountain 12, fountain roller 13, inking roller 14, and

rolling-in rollers 15, rotatably supported in bearings attached to the frames 11 and 11, andpositioned to engage the plate as it passes ingder the inking mechanism from right to An oscillating wiping mechanism well known inthe art is indicated at 16 and 16' and serves to wipe the excess ink from the surface of the plate after it has been inked.

Impression cylinders 17 and 17 are supported to rotate in bearings in the frame 11 and 11', and in brackets 18 and18, secured to a cross member 19 of the frame, and in position to engage'with the under side of the moving bed 20, to which the printing plate 20 is secured.

A blanket cylinder 21, is rotatably supported in bearings that may be arranged in any well known manner to give a limited vertical movement to the cylinder so that its periphery is periodically raised to the dotted line 21', in order that the bed may pass under the cylinder 21 onits non-printing stroke without causing the cylinder to engage the plate, this action being known as tripping the impression. I a

A feeding table 22, provides a support to hold a supply of sheets to be fed to the ma,-

chine, and has an inclined feed board 23,

on which the operator places the sheets, one

at a time, when they are to be printed. Registering stops, one of which is shown at 24, provide means for properly positioning the sheet on the feed board so that it will be printed in proper register.

The mechanism for controlling the motion of the bed 20, which is the novel feature claimed herein includes rails on which the bed slides forward and back in a path or track lengthwlse of the machine means for raising and lowering the rails so that the bed may be moved on a higher plane for the plate to engage the inking and wiping mechanism, and on a lower plane for it to pass without enga ing them when it carries a sheet; a chain driven by sprockets which rotate in but one direction but which is connected to the bed by a mechanism that produces a forward and reverse motion; and a guide which keeps the bed in its proer path and furnishes a s pport ior'the rl riving chain.

The rails 25 and '25, are held in place by brackets 26 and 26, secured to the "side name 11 and 11, but are free to move endwise in the brackets. at 27, are ivotally connected to the rails as shown at 28. This mechanism is duplicated on the other side of the machine, but it is necessary to describe but one.

The opposite end of the link 27, is pivoted at 29, to a lever 31, which is secured to the shaft 32, which turns in hearings in the side frame 11 and 11'.

A link 33, ivoted at 34 and 35, serv s to connect the lever 31 with bell crank lever 36, which is pivoted on a stud 37 and carries a roller 38, which engages a cam 39-, secured to the shaft 41, which is geared to run in proper timed relation with other elements of the machine. v

A rod 42, is pivoted at 48, on the lever 31, and passes through a post 44, secured to the frame. A sprin 45, is secured to the rod and presses against the pest serving to hold the roller ineu agement with the cam 39.

Rollers 46 are carried on studs secured to the side frame and serve to support the rails 25 and 25. Portions of the rails are cut away as shown at 40 for a purpose that will hereinafter appear.

When the cam 39 is in theposition shown in Figure l, the rails are moved toward the left hand or feeding end of the machine and parts which have not been cut away rest on the rollers 46, but when the cam 39 is in the position shown in Figure 2, the rails are moved toward the delivery end of the machine and as the cut away parts rest on the rollers the rails are depressed. It will readily be understood that this means for raising and lowering the rails enables the plate to pe moved in one direction in contact with the inking and wiping mechanism and in the other direction out of contact with them.

Links, oneof which is shown The bed 18 is moved forward and backward along the tracks by means of a chain 47, which passes around sprockets 4:8 and 49, and is held in alignment by the guide plates 51 and 52, suitably secured by brackets 53 to the cross members forming part of the frame.

A driving fork 54, having longitudinal and transverse slots is secured to the under side of the bed'and hasits longitudinal slot 55 fitted to slide along the guide 51, which thus keepsthe bed in the proper path.

Rollers 56 turning on studs in the chain engage with the side of the transverse slot 57 in the driving fork. The portion of the fork which engages one side of the guide plate 51 is ne essarily cut away in order that it may pass the brackets 53, but the other side is extended downward so that it will engage the rollers 56 when they are on the low side of thechain. From the above it wil-lbe seen that when the sprockets are driven the rollersattached to the chain will move forward and backward lengthwise of the machine and carry the bed with them.

In operation, and tarting with the parts in the osition shown in Figure 1, a sheet 58 is placed on the feed board with its rear edge against the stops 24. The bed carrying the plate which has previously been inked is moved toward the right and the sheet is caught between the plate 20 and the impression roller 21, which is then in the low position.

Immediately after the bed passes the impressio'n roller the cam 39 operates to move the rails to the osition shown in Figure 2, and the plate with the printed sheet adhering to it is carried to the right hand or delivery end of the machine where it is removed by an operator.

Before the bed starts in the opposite direction, the cam operates to raise the rails and the plate then passes into contact with the inking and wiping mechanism. The impression Cylinder 21 will then be raised and the plate will pass under and without touching it to reach the position shown in Figure 1, after which the cycle may be rept-zated.

What I claim is:

1. In a plate printing machine, a plate movable successively under inking and impression members, and means for moving the plate on a raised pathway to engage with the inkin mechanism, and on a lower pathway to avoid it.

2. In a plate printing machine, a bed movable on a track and arranged to support a printing plate, a guide for the bed, an inki'ng mechanism, and means for raising the tracks to engage the plate with the inking mechanism.

3. In a plate printing machine, an inking mechanism, an impression member, a printing plate, a bed to support the plate,a track along which the bed is moved to engage the plate with the inking mechanism and the impression member, and means for lowering the track so that the plate may pass under the inking mechanism without engagement therewith.

4. In a plate printing machine, an inking mechanism. a bed movable on rails and having a printing plate secured thereto, a chain for moving the bed under the inking mechanism and in engagement therewith, a sprocket normally rotating in one direction for driving the chain and means for lowering the rails to permit moving the plate under the inking mechanism but out of engagement therewith.

5. In a plate printing machine, a bed, a track, a chain for moving the bed forward and back on the track, a guide for the bed and the chain, and means for raising and lowering the track.

6. In a plate printing machine, a bed, a

track, a chain for moving the bed forward and back on the track, means for raising and lowering the track, and means effective in both the raised and lowered positions of the track for guiding the bed in its path and holding the chain in operating alignment.

7. In a plate printing machine, a bed, a track, means for raising and lowering the track, a chain running over sprockets and adapted to move the bed forward and back along the track when the track is in either the raised or lowered position, and a means effective when the track is raised and also when it is lowered, to guide the bed in its path and hold the chain in operating alignment. 1

8. In a plate printing machine, a bed, a longitudinally movable track, a chain for moving the bed forward and backward on the track, and means for raising the track when it is moved longitudinally in one direction and lowering it when it is moved in the reverse direction.

9. In a plate printing machine, a bed, a longitudinally movable track, a chain for moving the bed forward and backward on the track, means to guide the bed and the chain, and means for raising the track when it is moved longitudinally in one direction and lowering it when it is moved in the reverse direction.

10. In a plate printing machine, an inkingmechanism, a bed movable forward and backward on a longitudinally movable track, means for holding a plate on the bed, and means for raising the track when it is moved longitudinally in one direction and lowering it when it is moved longitudinally in the opposite direction, whereby the plate will engage the inking mechanism when the track is raised and avoid the inking mechanism when the track is lowered.

11. In a plate printing machine, a bed adapted to support a plate and movable forward and backward under inking and 1mpression members successively, means including a chain for moving the bed on a raised pathway to engage the plate with the inking mechanism and on a lower pathway to avoid engagement with it, and a sprocket rotating in but one direction for drivlng the chain.

In testimony whereof, I aflix my signature.

WILLIAM K. ECKHARD.

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