Patent GB-433705-A (GB)
Title: A machine for office printing, duplicating, ruling, perforating and/or similar operations
IPC: B41L15/02
Filed: 1934-02-13
Abstract: 433,705. Printing, perforating, cutting, &c. machines. SIDAY, G. A., 30, Kent Gardens, Ealing, London. Feb. 13, 1934, No. 4738. [Class 100 (ii)] [See also Group VIII] Cylinder machines; stencil-printing apparatus; ruling, perforating, cutting, and creasing machines.-A machine for office printing, duplicating, ruling, perforating, cutting, creasing, or like operations comprises a base, a carrier frame hinged or connected to the base, a casing pivoted to a slide moving in a guideway in the carrier frame, rollers, discs, &c. housed in the casing, and an automatic locking- device whereby the carrier frame is held in operative relation to the base on the movement of the casing in one direction and is released by the return movement. As shown adapted for stencil printing, an inking-roller a<12>, Fig. 1, is rotatably mounted in a casing A pivoted to a slide l movable in a guideway e formed in a frame N pivoted at P to a flat or curved base a, the casing being rocked, by means of a lever n fixed thereto at a variable angle, to lower the roller a<12> into operative position and to apply printing pressure. The stencil is mounted on the frame N, which is normally in the raised position, and the casing A is moved to the left for printing. At the beginning of this movement, the frame N drops on to the base and the slide b is released from pressure against a spur i such that plates pivoted together at j within the frame N collapse and move hooks b into engagement with catches f on the base a so as to lock the frame N in printing position. At the end of the return stroke of the casing A during which the roller a<12> is out of contact with the base, the slide l engages the spur and releases the lock, whereupon a balance weight O raises the frame N off the base. The frame N is provided with a hinged end to allow the casing A to be removed from the machine. A stencil is attached to a frame e<1>, Fig. 15, having a curved end against which the leading edge is clamped by means of a segmental plate t<3>, the trailing end e<9> being attached by cleats e<10>. A silk placed between the stencil and the frame engages pins at the trailing end and is secured at the other end by screws e' adjustable along curved slots in the head of the frame to vary the tension. The roller a<12> may be replaced by an impression roller where a printing-plate, type blanket, &c. is mounted on the base a, inking being effected by means of an ink-ribbon fed intermittently by a roller L rotated by ratchet mechanism actuated by a chain driven by a sprocket rotated by a rack reciprocated on an arm V by the rocking movement of a lever U carrying the balance weight O. The printed sheets may be delivered by bands L<10>, Fig. 25, passing over rollers L<1>, L2, rollers L<6> carried by a frame L<3> co-operating with the bands ; the roller L<2> is driven by the chain referred to above. The roller a<12> may be replaced by perforating, cutting, creasing, or ruling discs. Impression - adjustments.-The pressure exerted by the roller a<12> is controlled by a stop-arm b<1>, Fig. 1, limiting the downward movement of the lever n. The arm b is hinged to a plate b<2> fixed to the slide and its position is adjusted by means of a screw b<11>. Addressing machines.-Stencils d<6>, Fig. 12, each attached to a wire d<17> are placed in a holder consisting of spaced members D each consisting of inner and outer parts d<1>, d<2> forming a slot adapted to receive one end of the wire d<17>, the stencils being moved in turn from the outer part of the slot to the inner part so as to rest on a short platen d<11> hinged to the base a. After printing, the platen d<11> is raised and the stencil d<6> thus released drops down for removal. The parts d<1>, d<2> are hinged together at d<3> to permit insertion of the stencils. Inking-apparatus.-The roller a<12>, Fig. 1, is supplied with ink by a roller a<14> through the intermediary of a distributing-roller a<20> The roller a<14> consists of inner and outer perforated cylinders by relative axial movement of which the ink supply may be regulated. The ink is contained in the inner cylinder, a plunger being pushed forward to force ink through the perforations when required. The roller a<20 >is provided with an internally-projecting pin a<16>, Fig. 7, engaging an inclined groove formed between the inner ends of members a<17> whereby as the roller a<20> revolves it reciprocates longitudinally. By separating the members a<17>, the extent of reciprocation may be reduced. The distributing-roller a<20> may be raised off the roller a<12> by a handle which is fixed to the shaft of the roller a<20> and is swung round to bear on a fulcrum pin ; a catch on the lever n locks the handle when so adjusted.