Patent GB-438764-A (GB)
Title: Improvements in or relating to multiple column listing devices for addressing and like series-printing machines
IPC: B41L47/24
Filed: 1935-02-12
Abstract: 438,764. Printing-machines. JACKSON, L. MELLERSH-, 28, Southampton Buildings, Chancery Lane, London.-(Addressograph Co.; 1814, East 40th Street, Cleveland, Ohio, U.S.A.) Feb. 12, 1935, No. 4552. [Class 100 (ii)] Addressing and like machines; stopping and tripping arrangements.-In multiple - column listing-mechanism for addressing and like series - printing machines, the sheet &c. to be printed is mounted in a holder comprising gripping-means for the sheet, the sheet being movable relatively to the gripping-means in one direction and the sheet and gripping-means being movable as a unit in another direction, whereby part of the data on each printing-device may be printed in one column and another part may be printed in another column, but in alignment with the first impression. (1) Printing-plates D, Fig. 2, are fed from a magazine M by pawls 21 on bars 22 reciprocated by a bellcrank 27 oscillated from a main drive rocker 24 through the intermediary of a pawl 34, which is tripped at alternate cycles by a rod 83 operated by an intermittently - rotating ratchet 70, whereby each plate D remains in printing position while two impressions are printed. (2) The impression mechanism comprises a roller P, Fig. 2, which is lowered on to an anvil 40 by a rocking platen arm 42 and is then rolled rearwardly for printing, rollers 47 in contact with the roller P being maintained in contact with pressure bars 48 adjustable as described in (4) below. The roller P is carried by an arm 44 operated from the drive rocker 24 through a linkage, such that the roller commences its -return stroke after rising clear of the anvil. (3) One side edge of a list-sheet W, Figs. 1 and 5, bears against a shoulder 136 on a guide plate 132 and is gripped between feed rollers 140 and pressure rollers 148, the latter being carried by a pivoted spring-pressed arm 149 adapted to be lowered to release the sheet; a roller 300 inclined slightly to the sheet maintains the sheet against the shoulder 136. The guide 132 is adjustably secured to a carriage 131 mounted on a shaft 126 extending from a casing 120 having a slight adjustment about a pivot 121 to align the sheet with the printing-plate. The carriage 131 is moved transversely for column spacing by a connecting-rod 165 and crank 160, the length of the rod and the throw of the crank being adjustable to vary the position and distance apart of the columns. The crank 160 is rotated intermittently by a ratchet 168 oscillated by rack-and-pinion mechanism from a gear segment 174 fixed to a shaft 173 oscillated from the platen arm. To prevent overthrow of the crank, a braking action is provided on a shaft 161 to which the crank is fixed, by means of loose discs 190 prevented from rotating and discs 191 keyed to the shaft, the whole of the discs being pressed by a spring 195 towards a disc 198 which is lowered to increase the pressure during the effective movement of the ratchet 168 by a screw 196 rigid therewith and is raised during the return movement. The rollers 140 are rotated to feed the sheet longitudinally, by gears rotated from the shaft 126 which is rotated intermittently by a pawl 208 oscillated by a reciprocating bar 202 actuated by a crank pin 201 on the shaft 173. The sheet is advanced different distances on consecutive feeds corresponding respectively to the spacing of the data on the printing-plate and the impressions from consecutive plates, and for this purpose a stop 215 is swung alternately into the path of stops 216, 217 on a member 210 fixed to the bar 202, the stroke of which is therefore varied. A friction-disc brake device 240 on the shaft of each roller 140 prevents overthrowing. The longitudinal feed is effected during the down stroke of the arm 42 and the transverse feed during the up stroke ; alternatively, the feeds may take place simultaneously in which case the paper moves diagonally. (4) Each of the pressure bars 48 referred to in (2) above is rotatable to bring either of two cam-sections into operative position to apply pressure over an area corresponding to the bottom or top part of the printing-plate, arms 260, Figs. 1 and 5, for rotating the bars, being connected together by a link 261 which is actuated to rotate the bars whenever the carriage 131 is in the extreme left position, Fig. 5, in which a cam 263 extending from the carriage lies in the path of a roller 264 on the link 261. In place of the bars 48, a shield adapted to expose the appropriate part of the printing-plate may be attached to the carriage 131. (5) The rocker 24 is actuated by a crank 102, Fig. 2, fixed to a clutch disc 101 carrying a pivoted latch 105 by which the disc is coupled to a rotary disc 100. The latch 105 is disengaged to stop the machine whenever a lever 109 is rocked about a pivot 110 to move a stop 108 into the path of a lug 187 on the latch; a spring plate 116 on the lever 109 engaging a recess in the latch 105 acts as a brake. The lever 109 is pulled up by a spring 115 whenever a stop arm 113 is rocked counterclockwise about the pivot 110. The arm 113 may be actuated from a hand-lever or automatically by a solenoid energized by the closure of a switch 293, Fig. 1, effected when the list is full by an arm 290 advanced step-bystep by a ratchet 280 rotated by a pawl 282 oscillated an adjustable amount by the reciprocating bar 202.