US1451721A - Rotary printing press - Google Patents

Description

Am. 17, 1923. 1,451,72l A. TIERREY I ROTARY PRINTING PRESS 1 Filed July 29, 1922 I 2 sheets-sheet 1 Fig.1.

Inventor Q1. 291M176 y Apr. 13, 1923. HASLVZH A. TERREY ROTARY PRINTING PRESS Filed July 29, 1922 2 shets-sheet 2 Inventor uittarney.

(AA-M- Patented Apr. 17, 1923.

STATES ARTHUR TERREY, OFHAYES, ENGLAND.

ROTARY PRINTING PRESS.

Application filed July 29, 1922. Serial No. 578,476.

To (ZZZ w 710m. it concern:

Be it known that I, ARTHUR Tanner, a subject of the King Ireland, residing at 26 KeithRoad, Hayes, liliddlesex, England, have invented certain new and useful Improvements Relating to Rotary Printing Presses, of which the fol lowing is a specification.

This invention relates to transmission gear for rotary printing presses involving the use of driving worms which engage worm wheels or spiral toothed or helical wheels on the plate and impression cylinders, ink distributing drums and other moving elements of the respective printing sets in a rotary printing press.

According to the invention the worm is provided with threads of such an angle and pitch as to permit of the worms being rotated by the worm wheels so that thus on reducing the speed of the driving element, the plate and impression cylinders, ink distributingdrums and other moving elements may continue their movement under their own inertia. Thus there is no lock and their movement is not suddenlyarrested by the worms, but a certain resistance is offered through the worms in slowing down and thus each constitutes a brake by which the respective rotating elements driven from the worms are brought to rest.

It will be understood that the invention may be applied in the use of spiral toothed or helical wheels in which the threads are similarly provided of such an angle and pitch as to permit of the reverse driving of the worm wheels from the worms in the reduction of speed of the press and in slowing down.

The invention is illustrated by way of example in the accompanying drawings in which- Figure 1 is an elevation partly in section, and Figure 2 a side elevation partly in sec tion of a worm and worm wheel drive for the plate and impression cylinders and ink distributing drums for a rotary printing press. 1

In the drawings a represents the impression cylinder, 6 the plate cylinder, 0 the distributing drum, d the ink trans-fer roller by which ink from the distributing drum is fed to the plate cylinder, 0 is a horizontally disposed shaft on which worms f and f/ are mounted for engagement respectively with the worm wheel 7' upon the spindle of of Great Britain and .of the the impression cylinder a and the worm g on the spindle of the plate cylinder Z) respectively. The teeth of the respective worms and worm wheels are disposed at a considerable angle such as illustrated to permit of the reverse driving of the worm wheels from the worms in the reduction of speed press and in slowing down. Movement may be imparted to the spindle e directly from one of the press motors or from the gear of the press. Avertical spindle 7a is also provided having worms 2' and j mounted thereon for engagement respectively with the worm wheels upon the spindle of the plate cylinder and with the worm wheel Z: mounted upon the spindle of the distributing drum 0 respectively.

It will be understood that the angle of the teeth of the wheels 2' and and of the worm wheel is is the same as that of the worms f and g and of the worm wheels f and 9 re spectively and it will be understood that the drive may be imparted through the vertical spindle hi.

In the illustrated construction the worm f and worm wheel 7 are mounted within a casing Z, the worms 9 and z and the worm wheel 9 within a casing m while the worm j and the worm wheel are mounted within a casing 12.

Beside each worm a conical bearing ring 0 is secured upon the worm spindle by which the Worm spindle may be supported at each side of the worm within bearing rings 1) carried within circular caps or fittings g. A series of conical rollers 0 are interposed between the rings 0 and p respectively. The adjacent casings Z, m and a are completely enclosed and are in communication whereby lubricating oil may be circulated in series through the respective adjacent casings. For example the adjacent circular caps or fittings q disposed between the worms 7 and g are provided to fit one within the other and an annular space 7* is advantageously left through which the lubricant may pass from the casing Z to the casing m while between the casing m and casing 02 the spindle k maybe surrounded by a tube 8 leaving an annular space 8 between the spindle h and the tube 3 through which the lubricant may flow into the casing it while similarly a tube t may be provided to surround that part of the spindle 7L that extends beneath the casing n and in a similar way the circuit for lubricating oil may be completed by connecting the respective casings together in a. manner described inthe specification of a co-pending application.

The angle of the threads in the worm and worm wheel may advantageously be 31.

I claim:

1. A rotary printing prcsscomprising an impression cylinder and a plate cylinder, a

a worm Wheel on each cylinder, a plurality of shafts having worms thereon meshing with the worm wheel on the plate cylinder, a distrlbuting drum having a worm wheel thereon, and a worm on each shaft meshing with the worm wheels on the distributing drum and impression cylinder respectively,the said worms and Worm wheels having threads of such a pitch as to permit of reversed driving of the worm wheels from the worms in reducing the speed of the press or slowing down. 1.

2. A rotary printing press comprising an impression cylinder and aplate cylinder, a worm wheel on each cylinder, a horizontal shaft interposed between the cylinders and casings.

ARTHUR TERREY.

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