US730857A

US730857A - Delivery mechanism for printing-machines.

Info

Publication number: US730857A
Application number: US13366102A
Authority: US
Inventors: Robert Cumming Annand
Original assignee: Individual
Current assignee: Individual
Priority date: 1902-12-03
Filing date: 1902-12-03
Publication date: 1903-06-16
Anticipated expiration: 1920-06-16

Description

:PATENTED JUNE 16, 1903.

R. 0. ANNAND. DELIVERY MEGHANISM FOR PRINTING MACHINES.

APPLIOATIOIT FILED DBO. 3, 1902.

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110,730,857. PATENTED JUNE 16, 1903. R. 0. ANNAND.

DELIVERY MECHANISM FOR PRINTING MACHINES. APBIQIOATION nLnn mm. a, 1002.

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H R. 0.- ANNA ND. DELIVERY MEGHANISM FOR PRINTING MACHINES.

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PATENTED JUNE 16, 1903.

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DELIVERY MEGHANISM FOR PRINTING MACHINES;

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UNITED STATES Patented June 16, 1903.

PATENT OFFICE.

ROBERT OUMMING ANNAND, or SOUTH SHIELDS, ENGLAND.

DELIVERY MECHANISM FOR PRINTING-MACHINES.

SPECIFICATION forming part of Letters. Patent No. 730,857, dated June 16, 1903. Application filed December 3, 1902. Serial No. 133,661. No model.)

To all whom it may concern.-

Be it known that 1, ROBERT CUMMING AN- NAND, engineer, of Cornwallis street, South Shields, in the county of Durham, England, have invented certain new and useful Improvements in the Delivery Mechanism of Printing-Machines, of which the following is a specification.

This invention relates to the delivery mechanism of printing-machines, and has for its object to provide a delivery mechanism for web-printing machines which will deliver the sheets singly as they are produced by the machine and lay them flat on the deliveryboard at a high speed without the use of tapes.

The invention is intended to be applied chiefly to machines producing high-class work with illustrations, which require such a body of ink in their production that the sheets cannot be carried by tapes or folded as they are produced by the machine without smearing or marking the work.

My invention is shown applied in a machine comprising the combination, with a gripping device which seizes and carries a sheet of printed paper by its forward end, of an auxiliary gripping or retarding device which seizes the following or taileud thereof, grad? ually reducing the speed of the sheet until it is brought to rest over a receiving-table, a rotary pressing device which is brought down on the sheet pressing out the air between the last two sheets and laying each in turn fiat and evenly on the pile of sheets on the table. The said table may be set at any desired angle and may be lowered automatically or by hand as the sheets are deposited.

I will describe how the invention can be applied to a web-printing machine in which the sheets are cut from the web before they are printed. When this has been done, it will be readily understood by those conversant with the art how the invention could be applied to other forms of rotary web-printing machines in common use.

Referring now to the drawings, Figure 1 is a side elevation of a part of a web-printing machine, showing my invention. Fig. 2 is a plan thereof.

Fig. 3 is a sectional view through W X and Y Z. Figs. 4. and 5 show the sheet in different positions. Fig. 6 is the vacuum-valve. Fig. 7 is a modified form of rotary flier in which a brush is used instead of the bow-springs shown in Figs. 1 and 2, 4. and .5.

a, and b are stereocylinders.

c and d are impression-cylinders. Immediately below the impression-cylinder d is disposed a delivery-cylinder 6, preferably of the same size as the impression-cylinder d. This cylinder is carried in bearings in the framework of the machine and is driven by gearing at the same surface speed as the impression-cylinder d. At each end of the delivery-cylinder and inside the framework of the machine is mounted a sprocket-wheel). At a suitable distance and in about the same plane is disposed an axle it, carried by bearings in the framework, having a sprocketwheel at each end thereof which are each in line with one of the two sprocket-wheelsf. Stretched'between these two sets of sprocketwheels are two endless sprocket-chains m and at. These chains carry a series of gripperbars 0 and grippers 0, extending right across the machine. These gripper mechanisms may be termed the leading grippers.

q q are rollers connected with the gripping device and adapted to ooact with the cams r and s for the purpose of opening and closing the grippers 19 onto the gripper-bars 0. The delivery-cylinder e is so constructed with a longitudinal slot 12 in it that as each gripperbar 0 and set of grippers U come around they drop into the longitudinal slot and form therewith for the time being a cylinder with gripper mechanism at one part of its surface. The cylinder and gripper mechanism are so timed that they will transfer the newly-printed sheet 20 from the last impression-cylinder to one set of the grippers on the sprocketchain. Below the sprocket-chain is disposed a delivery-table 00, which is preferably provided with a hinged top or board y and adapted to be set at any convenient angle.

Immediately below the delivery-cylinder e is a gripping device adapted to revolve at a less peripheral speed than that of the delivcry-cylinder. One form of gripping device,

which may be termed an auxiliary or following gripper, comprises a hollow shaft or tube 2, carrying a toothed wheel 3. Said hollow shaft is adapted to revolve in bearings disposed on brackets or arms 4, which are secured to another shaft 5. This shaft 5 passes through a toothed sleeve 6, fixed to the frame of the press, and is driven through suitable gearing from the delivery-cylinder e and is adapted to be adjusted so as to vary the distance of the following gripping device from the point where the gripping device on the sprocket-chain comes into operation in order to suit the length of sheet in use. Between the toothed wheel 3 on the hollow shaft 2 and the toothed sleeve 6 there is a toothed pinion 7, gearing with the said wheel 3 and sleeve 6. The hollow shaft 2 has a flat side or surface 8,111 which there are a number of small holes 9,1eading to the inside of the tube, which comcommunicates through the axle with a vacuum-chamber. This tube 2 is so geared with the axle 5, about which it revolves, that the fiat part 8 is always in a horizontal position with the air-holes perpendicular. This device is so timed that as the tube approaches the delivery-cylinder a valve is opened communicating with the vacuum-chamber, creating a vacuum in said tube and causing it to seize and hold the tail of the sheet w.

Disposed above the delivery-table is a rotaryflier or pressing device adapted to descend on the middle of the sheet and press it onto the delivery-table and to rise again, the operation being timed to operate as a sheet is brought on the table by the leading grippers. One form of flier consists of longhaired brushes 10 or light bow-springs 11, mounted on a shaft 12 and adapted to he slid thereon, so as to press on the margins of the sheets, said shaft carrying a toothed wheel 13. The shaft takes its hearings in arms or brackets 14, mounted upon another shaft 15, which passes through a toothed sleeve 16, fixed to the frame of the press. This shaft carries a sprocket wheel 17 and is adapted to be driven by an adjustable chain 18, passing around a sprocket-wheel disposed on the takeoff or delivery cylinder. Between the toothed sleeve 16 and the toothed Wheel 13 on the flier-shaft 12 is a toothed pinion 20, adapted to gear therewith. The action of the apparatus is such that while the flier revolves the tips of the brushes or the bows of the springs are made to work up and down in a vertical line. The vacuum in the tube 2 is controlled by a spring-pressed plunger-valve 21, connected to a lever 22 and operated by a cam 23.

In operation when the gripper or set of grippers p on the sprocket-chains m 'n has been closed onto the sheet to by cams r, suitably disposed, the sheet is carried thereby around the delivery-cylinder e until the gripper mechanism carried by the said sprocketchain leaves the delivery-cylinder 6. The sheet is then carried over the delivery-table a; in a horizontal manner until. the grippers p p, which may be called leading grippers, are opened by a cam device 3, suitably disposed, whereby the sheet is released. The position of the cams sis adjustable to suit the length of sheet being printed. The sheet is kept pressed against the delivery-cylinder e by springs 24, adapted to come in contact with the margins of the sheet. At the moment that the sheet is released by the said leading grippers p p the following edge or tail is seized by the tail-gripping device, disposed below the delivery-cylinder. -As soon as the tail of the sheet has been thus caught the speed at which the sheet is advancing over the delivery-table is reduced, While at the same time the tail of the sheet is carried downward onto the delivery-table w. When the sheet is brought down onto the table, the vacuum in the tube 2 is destroyed and the tail of the sheet is released, the position of the tube beingsuch that the sheet is brought to a dead stop. At the same time the rotary flier descends onto the middle of the sheet and presses it down onto the pile of sheets already delivered. The delivery-board is-so constructed that as the pile of sheets increases it is gradually lowered either automatically or by hand to make room for additional sheets.

What I claim, and desire to secure by Letters Patent, is

1. In delivery mechanism forprinting-machines the improved auxiliary gripping and pressing devices comprising the combination of a rotating shaft, arms on said shaft, a perforated tube mounted on said arms and moving around the shaft with its perforated face always horizontal, connections between the perforated tube and shaft for imparting the required movement to said perforated tube,

means for connecting the perforated tube to an air-exhausting apparatus whereby the air in the perforated tube may be exhausted so as to grip and hold the sheets of paper, substantially as set forth.

2. In delivery mechanism for printing-machines the improved auxiliary gripping and pressing devices comprising the combination of a rotating shaft, arms on said shaft, aperforated tube mounted on said arms and moving around the shaft with its perforated face always horizontal, connections between the perforated tubeand shaft for imparting the required movement to said perforated tube, means for connecting the perforated tube to an air-exhausting apparatus whereby the air in the perforated tube may be exhausted so as to grip and hold the sheets of paper, a delivery-table onto which the gripper delivers the sheets of paper, a shaft located oversaid table, arms on said shaft, a rotating spindle mounted on said arms, a resilient pressing device mounted on said spindle, means for I In witness whereof I have hereunto signed actuating said resilient pressing device from my name in the presence of two subscribing the shaft above the table so that the pressing witnesses.

device moves to and from the table as the ROBERT OUMMING ANNAND. 5 shaft rotates and as the sheets are delivered Witnesses:

thereonto by the gripper, substantially as set ROBERT M. SPEARPOINT,

forth. W. M. HARRIS.