Patent GB-348551-A (GB)
Title: Improvements in combined rotary duplicating and addressing machines
IPC: B41L19/00
Filed: 1930-02-12
Abstract: 348,551. Rotary duplicators. BORDT, A. and BUSCHBECK, H., 62, Delitzscher Strasse, Leipsic, Germany. Feb. 12, 1930, No. 4791, [Classes 100 (i) and 100 (ii).] Stencil-printing apparatus; addressing and like machines; supports for sheet feeds; sheet-separators; sheet-guides.-In a stencil-duplicator of the rotary drum type, the drum is provided in front of the usual text stencil with a device for the reception of exchangeable address-stencils, which are extracted from a magazine arranged on the frame of the machine. As shown, a duplicator drum 3, Fig. 3, rotatably mounted on a fixed shaft 5, comprises a strainer 7 over which is stretched the usual ink-pad and stencil, a perforated stay 8 adapted to support an address-stencil, and a removable cover 10. Address-stencils stored in a vertical magazine 55, Figs. 1 and 7, rest on a plate 56, which is pivoted on a shaft 57 and is supported by a lever 58 fixed tc this shaft. A roller 59 on the end of the lever 58 periodically falls into a recess in one side edge of the drum and lowers the stencils so that the forward edge of the lowermost one rests on the drum. As the drum rotates, a ledge 62 thereon engages behind the front of the marginal frame of the stencil and removes the stencil, which is retained on the drum by fingers swung inwardly so as to grip the stencil; the fingers may be replaced by claws movable radially so as to press the stencil against the drum. After printing, the retaining- devices are released by lugs 75a on a stripping- guide 75, and the stencil enters the guide and is gradually pushed out into a receiver. The guide 75 is pivoted at 77 to the magazine 55, and may be moved into an inoperative position by a cam lever 80, so that repeat impressions may be printed from any desired stencil ; at the same time, a lug 81 on the guide 75, by engaging an arm 58b, turns the shaft 57 and raises the lever 58 so that the stack is raised and the stencil feed is interrupted. The machine may also be used for printing texts or addresses separately, an ink-proof cover being laid over the part of the drum not in use. The addressstencil is inked by a pad 22, perforated plates 25 and wire gauze sheets 26 alternately arranged being provided between the stay 8 and the pad. Inking-apparatus.-A vertically movable inktrough 100, Fig. 3, is carried by rods 104 passing through holes in the shaft 5, and is provided with guide brackets 101 embracing the shaft. Levers 106 resting on a bar 105 connecting the rods 104 are depressed by means of a cam 128 fixed on a sleeve, which may be rocked about the shaft 5 by means of a hand-lever 130 to lower the trough 100 and therewith a duct roller 123 mounted in slots in the sides of the trough. An inking-roller 120 for supplying ink to the ink-pads is supported by levers 115 adapted to be rocked about a shaft 117, to raise and lower the roller 120, by the cam 128 acting through a pivoted member 125 : the levers 115 are connected by springs 114 to arms 113 pivoted at 112 and provided with lugs 111 bearing against adjustable screws 110. The lever 130 may be adjusted to give different positions a .. e. (b) is the normal position in which the roller 120 is in operative position and the trough 100 is raised. (a) The lever is moved to this position to avoid excessive inking, the trough being lowered so that the roller 123 is out of contact with the roller 120, which continues to engage the drum. (c) Both the roller 120 and the trough are lowered so that the roller 120 inks the address-stencil but not the textstencil while still receiving ink from the roller 123. (d) The roller 120 and the trough are lowered still further so that the inking-apparatus is completely out of action. (e) The roller 120 is in position (c) but the trough is lowered so that the supply of ink to the roller 120 is interrupted. Tripping, throw-out, and like arrangements.-The drum 3 may be rotated in either direction by turning a hand-crank fixed to a gear 12, Fig. 1, engaging a gear 11 loose on the shaft 5, pivoted arms 15, connected at their lower ends by a spring 17 and carrying rollers 16 engaging the inside of a rim at one end of the drum, being mounted on a block 14 fixed to the gear 11; by pressing the arms 15 together, the driving connection may be broken to permit adjustment of the gear 12 relatively to the drum. An impression roller 4 is provided and is carried by pivoted arms 30 pressed upwardly by springs 33 so that a lug 30a on one arm engages a projection 32a on an arm 32 periodically rocked about a pivot 31 by a cam 18 on the wheel 11. To provide additional pressure while printing the address, the roller 4 is locked in the position it occupies while printing the text, the address-stencil being at a greater radius than the text-stencil, and, for this purpose, a cam is provided on the drum 3 to engage a roller 94 on one arm of a bell crank 93, the other arm being connected by a spring 91 to a pivoted arm 90 carrying lugs 28 adapted to hold the arms 30 in the raised position.