Patent GB-331335-A (GB)
Title: Apparatus for removing printing plates or the like from holders or frames having means releasably holding the plates against displacement particularly for use in addressing machines or the like
IPC: B41L47/14
Filed: 1929-05-24
Abstract: 331,335. White, A. E., (Burroughs Adding Machine Co.). May 24, 1929. Addressing and like machines; printing- surfaces.-Apparatus for removing printing-plates or the like, for instance, address-plates, from holders or frames having means releasably holding them against displacement comprises means for releasing a plate from its holder and for removing the released plate. As shown, each holder comprises a metal stamping 10, Fig. 1, provided with struck-up lugs 12 forming with a turned over side edge. 11 a slot to receive, an address plate 13 inserted endwise and retained by spring tongues 14 engaging the ends of the plate. The holders are stacked face up in a rectangular magazine 20, Fig. 11, from which they are removed one at a time by a reciprocating plate 21, Fig. 6, and, as each holder is fed, ribs 16, on its under side enter guide grooves 22, Fig. 11, and the holder moves under a. spring-pressed plate 23 which maintains the ribs in the grooves. The plate 21 is fixed to a slide 25, Fig. 6, which is reciprocated by a rod 26 oscillated about a fixed pin 30 by a, crank 27 having a slidable connection 29 with the rod, the latter being slotted at its lower end to engage the pin 30, and a spring 33 being connected to the pin and to the slide to prevent chattering of the crank when its shaft 28 is stopped. At its upper end, the rod 26 has a pin 35 engaging a slot 36 in the slide 25 a spring 37 urging the pin 35 to one end of the slot in which position it is retained by spring-pressed pins 40 adapted to yield and prevent damage if the mechanism should be blocked. The shaft 28 is rotated by an electric motor through a clutch which is moved into engagement by depressing a. plunger retained in depressied position by a releasable latch. While a holder is moving out of the magazine, the tongue 14 at the discharge end is depressed by a pivoted finger 61, Fig. 9, depressed against spring action by a cam 67 mounted on a bar 68 fixed to the slide 25, the cam acting on a pawl 64 pivoted to the outer end of the finger 61. The height of the cam may be adjusted to vary the throw of the finger. The plate 13 is immediately afterwards pushed slightly to the left by a finger 72 so as to cover the depressed tongue and retain it in the depressed position during the subsequent travel of the holder. The finger 72 is on the end of an arm 73, Figs. 7 and 9, which is rocked about a pivot 74 against the action of a spring 75 by an arm 87 oscillated about a pivot 83 by an arm 82 connected thereto bv a spring 88 and rocked about the same. pivot by a pawl 77 on an extension 76 of the slide 25, a screw adjustment 76<a> being provided to vary the position of the pawl and so to time the action of the finger 73. The end of the finger has a lug 89 to ensure action bv the finger even though the plate varies slightly in vertical position. The plate 13 is completely ejected and discharged over a guide 103 by a friction roller 90, Fig. 11, mounted on the end of a swinging arm 93 and rotated continuously by a belt 46. The roller 90 is lowered on to the plate 13 by means of a cam 110 mounted on the slide 68 and adapted to engage a roller 112 carried by a pawl 113, which is pivoted on the arm 93 and is cut away at one corner so that, on the forward strobe of the slide 68, the pawl rocks about its pivot, but, on the return stroke, it is locked to the arm 93, which is consequently rocked about its pivot to lower the roller 90 into engagement with the plate 13.