GB951899A - Printing press plate cylinder - Google Patents

Abstract

951,899. Printing surfaces. HARRISINTERTYPE CORPORATION. March 30, 1962 [April 11, 1961], No. 12257/62. Heading B6C. A printing press plate cylinder 10 having an axially extending gap 11 in the periphery thereof is provided with plate clamping means mounted in said gap comprising an elongated member 25 extending lengthwise of said gap adjacent one of the longitudinal sides thereof, a plurality of plate clamping units including plate clamps 17, 18, 19 and 20 carried by said member 25 and spaced along said side of said gap, each of said units being adapted to receive and clamp a plate section, means interconnecting said units for unitary movement in at least one direction and for individual adjustment selectively in said one direction, and means for adjusting said units as a unitary member in said one direction or individually in said one direction. A plurality of plate sections 15a, 15b or a single plate section, not shown, may be clamped at the leading and trailing sides 12 and 13 of the gap 11 by a set of four plate clamps disposed along each side. Plate clamps 17 and 18 on the trailing side 13 cooperate with a clamp bar 22 and plate clamps 19 and 20 co-operate with a clamp bar 23. Each plate clamp is rockably supported on its bar between an open position and a closed position in which it is adapted to clamp the plate 15, Fig. 4, against its supporting bar, the plate clamp 20 for instance having recesses which receive nuts 30 the undersides of which form rocking surfaces for the plate clamp. A portion 21a of the plate clamp 20 extends over a rod 32 which on rotation moves the clamp 20 against the bias of a spring 36 to a clamped position. The clamp bar 23 is slidably mounted on the elongated member 25 which forms a carrier bar and is movable away from the side 13 in opposition to the action of springs 40 and 41 by means of screws 46 and 47. The clamp bars 22, 221 and 23<SP>1</SP> are similarly adjustable on their respective carrier bars. The clamp bar 23 may be adjusted lengthwise of the bar 25 to effect side registration of a plate section clamped by the plate clamps 19 and 20 by means of screws, Fig. 6 (not shown), which are threaded through blocks secured to the bar 25 and engage the sides of a block attached to the bar 23. The bar 22 is similarly interconnected with the bar 25 and the bars 22<SP>1</SP> and 23<SP>1</SP> are also similarly connected with the bar 25<SP>1</SP>. The bar 25 is adjustable lengthwise of the gap 11 by operating screws 60 and 61 which are threaded through projections 62 attached to the bar 25 and engage a post 63 rising from the bottom of the gap 11. The bar 25 is adjustable away from the side 13 by operating screws 72 which engage pins 73 contacting the side 13. The bar 251 is similarly adjustable. The bars 22 and 23 are movable away from the side 13 without moving the bar 25. Guide and hold-down plates are provided for the bars 22, 23 and 25, Fig. 3 (not shown). Abutment means is provided for registering the plate clamps on their respective bars and pin means, Fig. 7 (not shown), may be provided for positioning the leading and trailing edges of the plate, the pin being removed when the plate clamps have been actuated.