Printing machines

• Main Authors: MAUL JOHN A, ANDERSON DAVID D
• Format: Patent
• Language: English
• Published: 11.10.1966
• Subjects: ADDRESSING MACHINES OR LIKE SERIES-PRINTING MACHINES; APPARATUS OR DEVICES FOR MANIFOLDING, DUPLICATING, OR PRINTINGFOR OFFICE OR OTHER COMMERCIAL PURPOSES; LINING MACHINES; PERFORMING OPERATIONS; PRINTING; STAMPS; TRANSPORTING; TYPEWRITERS

1,106,080. Printing-apparatus. ADDRESSOGRAPH MULTIGRAPH CORPORATION. 17 March, 1965 [1 July, 1964], No. 11332/65. Heading B6C. A cylinder machine suitable for printing on carbon paper-interleaved form sets F, Fig. 7, of varying thickness comprises a bed 10 adapted to support an embossed plate such as 16, an impression roller 32 supported in a carriage 12 arranged to be moved into the dotted line position and back again, means for lowering the roller in response to the initial movement of the carriage, and means for sensing a function of the combined thickness of the plate 16 and the set F, whereby the action of the lowering means is terminated when the roller 32 reaches a level at which it will apply a suitable impression pressure to the superimposed assembly on reciprocation of the carriage. A plurality of embossed plates and a date stamp may be supported on the bed, Fig. 1 (not shown), which is also provided with guides for the form sets. The shaft 33 of the roller 32 is supported in the eccentric bores of a sensing assembly 34 and a return cartridge 36, Fig. 2. The assembly 34 includes, in addition to its eccentric bore, a yield spring mounted in a concentric passage, a driving collar 84, a gear sector 86 adapted to engage a rack secured to the bed, and a clutch unit, Figs. 3 and 4 (not shown), provided with a housing 88 having a shaped internal surface engaged by rollers. The clutch unit acts to prevent the roller 32 rotating in a non-printing direction. In operation the carriage 12 is moved to the right, Fig. 7, and camming surfaces 60 are moved out of engagement with rollers 58 enabling a clamp 30 to be lowered on to a form set F by spring pressure. As the carriage is moved further the gear 86 engages its rack and rotates the roller which is lowered by means of its eccentric mounting; a spring in a concentric bore of the return cartridge 36 is simultaneously wound up. When the roller contacts the upper surface 31 of the clamp the lowering motion is stopped, further drive to the gear 86 being absorbed by the yield spring within the assembly 34. The clutch unit holds the roller in its adjusted position until it is released by either a projection on the bed at the end of the printing stroke or by an emergency release button 170. Means are provided, Fig. 10 (not shown), to prevent accidental leftward movement of the carriage. Plates and clamps of different thicknesses may be used. In the embodiment of Fig. 12 (not shown), the roller is lowered in two stages, the final lowering movement being effected after the roller leaves the clamp. A spacer is located under the leading edge of the plate. In a further embodiment, Fig. 13 (not shown), the clamp is replaced by a block or pad underlying the leading margin of the form set F.