US1811379A - Plate printing machine - Google Patents

Description

June 23, 1931.

W. E. BENNISON PLATE PRINTING MACHINE Filed Sept. 5. 1928 5 Sheets-Sheet l INVEN'I'OR .EIZWlBENNISON.

June 23, 1931. )w. E. BENNISON PLATE PRINTING MACHINE Filed Sept 5, 1928 3 Sheets-Sheet 2 IENTOR wmsowazumsou u 23, 1931- w. E. BENNISON 1,811,379

' PLATE PRINTING MACHINE Filed pt. 5, 1928 3 Sheets-Sheet 5 INVENIOR I U E I/I ID,

WM.EDW.BENNISON.

Patented June 23, 1931 UNITEDSTATES PATENT OFFICE 1 wiLniArr EDWARD BENNISON, or WANDSWORTH BOROUGH, ENGLAND, ASSIGNOR TO B. HOE & 00., INC., on NEW YORK, N. Y., A CORPORATION or NEW YORK PLATE PRINTING MACHINE Application filed September '5', 1928, Serial No. 304,124, and in Great Britain September 22, 1927.

The present invention relates to improve ments in plate printingmachines in which 7 the printing is done from a plate having an intaglio image thereon and. in which the excess ink is removed from the surface of the plate or plates by means of a blade commonly known as a doctor blade.

The especial object of the invention is to provide an improved means for removin the aGGHIHUlaLhiOH of ink from the doctor b ade.

It is also an object of the invention to provide an ink salvaging mechanism of generally improved construction, whereby the device will be simple, durable and inexpensive in construction, as well as convenient, practical, serviceable and eflicient in its use.

'With the foregoing and other objects in View, Which will appear as the description proceeds, theinvention resides in the combination and arrangement of parts, and in the details of construction hereinafter de scribed 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 Wi-tlioutdepartiing from the spirit of the invention.

Beferringto the drawings: Figure 1- represents a portion of a rotary so intaglio plate printing machine and shows a section ofthe plate cylinderbearing a printing plate from which the ink is being removed by a doctor blade, also the mechanism for'removing: the ink from the blade, and

various associatedv parts, the functions of which will be hereinafter explained.

Figure 2 shows a portion of the mechanism shown'in Figure 1 with the parts in the pow sition they assume when ink is being removed 1 from the" doctor blade.

Figure 3 is a View similar to Figures 1 and 2,showinga portion of the mechanism with the parts in the position they occupy when }p the doctor-blade is thrown out ofengagement with the printing plate',and

Figure tisa plan view of a portion of the mechanism as viewed in the direction of arrdweef Figure 1.1 I i v Referring to the drawings, 11 indicates a side-heme of sprinting machine and 12 a between blocks 15 and 16 carried in a slot in the arm 17, the required clamping pressure being supplled by means of the thumb screw 18 which is threaded into the arm 17. The

arm 17 is secured by the key 17 to the shaft 19 which is journaled in the bracket 20. It will be understood that the frame 11 and various parts such as those numbered 15 to 20 are duplicated on the opposite side of the machine from that shown in the drawings.

A forked arm 21 is also secured to the shaft 19 and the forked members of the arm are fitted with a shouldered stud 22, the purpose of which will be hereinafter explained. The forks of the arm 21 are slotted to receive the stem 23 of the guide 23 and a pivoted cap 24, locked in position by the thumb nut 25, serves to hold the guide stem 23 in its seat.

The arm 26 is loose on the shaft 19 but can be secured thereto by means of the shouldered stud 22 and the nut 27, for it will be understood that tightening the nut 27 will clamp the arm 26 to the forked arm 21 which is secured to the shaft 19. The opening 29 in the arm 26, that receives the stud 22 is made in the form of a slot so that a certain range of adjustment in the relation of the arm 26 to the other parts carried by the shaft 19 is provided. A roller 30 is carried on a stud 31 near the end of the arm 26, and engages a cam 32 secured to the cylinder 12. A rod 33 has a head portion 34: that is fitted to turn on the stud22. A collar 35 is secured to the rod 33 and forms a seat for the spring 36. The square shaft 37 is pivoted in the bracket 38 secured to the frame, and a bushing 39 is threaded into theshaft 37 and has a clearance hole through it for the rod 33. The bushing furnishes an abutment for the spring 36 and also a means for adjusting the spring tension.

A bell crank lever 40 is pivoted on a stud 41 threaded into the frame 11. One end of the lever carries a roller .42 which engages acam 43 carried on the cylinder 12 while the other end carries a stud 44 which passes through an eye in the head end of a rod 45.

The rod 45 has a large diameter portion that slides in the sleeve 46 which is a part of the guide 23. The small diameter section of the rod 45 passes through the guide 23 and carries the spring 49. Lock nuts and 51 are threaded on to the end of the rod and serve as a means'for adjusting'and as an abutment for, the sprlng 49 the other end of wh ch presses against the guide 23. r The bell crank lever is. thus biased to tllIIlflIl' aclockwise direction but is limited in its travel by the nut 47, which maybe turned with-relation to the rod 45 to properly adjust the'relation of the members and it may be securedby the lock nut 48. j c

Means for adjustment to compensate for variations in the Width of the doctor blade dueto wear is provided by the hand-wheel the movable 19 is jo'urnale'd,

49, acting through the fixed bracket 50 and "An ink salvaging roller 51 is journaled in arms 52 which are pivoted at 53 and provided with a two way adjustment by means of screws 54 and 55, threaded into the bracket 56 secured to the frame 11. It will be understood that this adjustment permits raising or lowering the roller 51, asdesired. The roller 51 may be driven by. any convenient means -suchas the gears 57, 58, 59 and 60 which connect it to a running shaft of the machine.

7 A scraping blade 61 is supported on ashaft pivoted at 62 andprovided with a two way adjustment by means of the screws 63'and 64so the blade may be set to bear against the roller, with the desired pressure.

the scraper 61, In operation, plate turns clockwise and while the cylinder carrying the the plate is passing'under it, the blade 14 accumulates a j When. the rear edge of the plate 13 reaches the blade 14 quantity of ink on its lowerside.

the roller 30 will have reached the end of the cam '32. The cam 43 will have acted onthe "roller--42 and turned the bell crank 40, thereby turning the shaft 19 andbringing the doctor blade 14 into engagement with the roller 51 as shown in'Figure 2. Asthe roller is being turned clockwise, the ink that is on the v doctor-blade will be wiped 0E on the roller 51. 1 The roller 42 will then have passed the high portion of the cam 43 and in rolling downto the low portion will permit the spring 49 to return the doctor blade 14 and the roller 30 to the position shown in Figure 1.

" It will be understood that cams similar to 32 and 43 are provided foreach printing plate carried by the cylinder 12. Thelength of the cams 32 will vary with the length of the plates and their forward side will act onmay bracket 20,-in which the shaft An ink reservoir 65 is located under the roller 51 and will then act to press the face 66of the arm 26, against the stop 67, therebyholding the doctor blade in a convenient position for inspectlon.

As theroller 51 rotates, the that, is c deposited on itistaken 0E by the blade 61' and falls intovthe reservoir 65 from which it lee-removed at convenient times. W hat I claim is:

1. In a printing -macl1ine,wa cylinder, a v,

printing plate on the cylinder, an ink salvaging roller, a blade-secured to a cpivoted support, means for pressing the bladea'gainst p 1 e 1 v. the plate, means 101' moving the blade into engagement with the salvaging roller, a cam roller on an arm operably connected tovthe support,a11d accam'on the cylinder adaptedto engage the roller and positionflthecbla'de with respectto the plate. I v

2.111 a printing machine, a cylinder, a printing plate onthe cylinder,.a doctor blade secured to a swinging-support, an ink salvaging roller, meansfor pressing. the blade againstthe plate, an arm operably connected to the support, a cam rotating Withthe cylinder and adapted to engage the rollerzand position the blade with :respect to the plate, a

second arm operably connected 'tothe sup.- port, a roller on the'second arm, and a second. cam rotating with the cylinder adapted, to

engage the roller on the second arm and move the doctor blade into engagement with the inksalvagingrollerw printing plate on the cylinder, an ink-salvaging roller, and a doctor blade secured to a swinging support and .movableto one posi tion for engaging. the plate, to another-posh;

c 119 In a prmtmgi machine, alcylinderfa tion for engaging the salvaging. rollerandto another position convenient for itsinspection', means for pressingthei blade against the plate, an arm 'operably connected to the support, acam on the. cylinder adapted to engage the roller and position the'blade with respect to the plate, a second armoper'ably, connected'to the support by a hand operated securing means'whereby it may .be discon-i nected quickly, a roller on the second arm,- and a a second cam on the cylinder adapted to engage the roller on the second army and move the doctor blade into engagement'withthe salvaging roller.

In a printlng machindaa cylinder, "a

"' der and covering a it to the plate engaging printing plate secured to the cylinder and covering a portion of its periphery, an ink salvaging roller, and a blade secured to a pivoted support and arranged to press against the plate while the cylinder is rotated, and after the plate has passed, to swing toward and past the cylinder and engage with the ink salvaging roller.

5. In a printing machine, a cylinder, a printing plate secured to the cylinder and covering a portion of its periphery an ink salvaging roller, a doctor blade secured to a pivoted support and arranged to be pressed against the plate while the cylinder is ro- I tated, and after the plate has passed, to be swung past the cylinder and into engagement wlth the ink salvaging roller, and means associated with the support adapted to engage with operating means rotating with the cylinder. for positioning the blade with respect to the plate and for swinging it into engagement with the ink salvaging roller.

6. In a printing machine, a rotatable cylinder, a printing plate secured to the cylinportion of its periphery, an ink salvaging roller, a blade secured to a pivoted support and arranged to be held in one position to engage with the plate and in another position to engage with thesalvaging roller, actuating means connected to the cylinder adapted to engage with operating means connected to the supportfor moving the blade from plate engaging position to roller engaging position and then returning position. In testimony whereof, I aflix m signature. WILLIAM EDWARD BE NISON.

Images