Patent GB-190910477-A (GB)
Title: Improvements in Stencil-duplicating Apparatus.
Inventor: MILLS BENJAMIN JOSEPH BARNARD
IPC: B41L13/18
Filed: 1909-05-03
Granted: 1909-11-11
Abstract: 10,477. Mills, B. J. B., [Dick Co., A. B.]. May 3. Stencilling-apparatus; inking- apparatus ; tripping - arrangements.-Stencil duplicators are fitted with means for distributing the ink over the interior surface of the ink-pad, consisting of a brush &c. which can be moved longitudinally and circumferentially over the pad, or which is reciprocated longitudinally while the drum is rotated. The distributor may be combined with an ink-container, or the ink may be poured in from an ordinary container. In its simplest form, the distributor consists of a brush a', Fig. 9, adjustably secured to a sleeve a' on a telescopic shaft a, which can be moved longitudinally and be rotated by a crank a<1>. In the form shown in Figs. 2 and 3, the distributor consis's of a brush I on a plate i adjustably secured to an ink-container E by screws i<1>, and a spring may be arranged to press the brush on to the inkpad. The brush I and the container E are actuated by a rod D which nominally passes through the container E and is supported by stub shafts b, b<1>, on which the drum is mounted, and, in the operative position of the stencil drum, the rod D is held locked in the position shown in Fig. 3 by the engagement of an orifice in an angular piece attached to a crank on the rod D by a pin on a brake, which is actuated to hold the drum when the impression roller B<1> is thrown out of printing- position by an eccentric B'. When the brake is actuated to hold the drum, the rod D can be drawn out. On drawing out the rod D, it is locked to the container by a spring-raised bolt G, passing through the container and formed with a groove g<2>, Fig. 10, through which the rod D is drawn. When the groove g<2> comes opposite a reduced portion F of the rod, the bolt rises and engages the edge of the reduced part F. The reduced part F is semicircular in cross-section, so that, by rotating the rod D to the position shown in Fig. 10, the bolt G rises, and the container E is locked to the rod and can be rotated with it. In this position of the bolt G, a pin e' on the bolt, which is normally engaged by a slot e<3>, is opposite a slot h<3> in a spring- metal plate H, which can then be rotated so as to move stoppers h<1>, h<2> away from air-vent and inkoutlet ports ; ink is in this way deposited on the drum, and is subsequently distributed by the brush I. The plate is formed with notches which are passed over projections e<6> on a hub of the cover e<2> of the container E. In a modification, a brush distributor is attached to a cage in which an ordinary ink-can is secured by means of screws which also secure a flanged cover, provided with an ink-outlet normally closed by a valve. The cover is adapted to receive a rod, such as D ; the rod and cage are locked together by means of pin and notch, and a spring on the cover which engages a slot in the rod. In another form of distributor, Fig. 11, a container E and a brush are reciprocated longitudinally along the drum by a spring - pressed follower F on the container, which engages a shaft D provided with reversely-formed grooves d and with an annular groove d', in which the follower F may be placed when the container is to be at rest. The follower F may be held in either of the three positions which it occupies in the grooves by means of a pin carried by a spring f<5>, which engages one of three holes in a disk f<2> on the follower. The container may be kept from rotating by a pin g<2>, which engages an arm on a sleeve G connected to a cross-bar g<4> passing through the container, but when the container has been moved to any desired position within the drum, the pin g<2> may be withdrawn and the container and brush rotated to distribute the ink, the follower F being withdrawn during the rotation. The shaft D is driven by gearing comprising a pinion i<3> which can be disengaged from its driving-pinion.