Patent GB-191201946-A (GB)
Title: Improvements in Machines for Finishing Stereotype Plates.
IPC: B41D5/00
Filed: 1912-01-24
Granted: 1912-07-25
Abstract: 1946. Goss Printing Press Co., [Goss Printing Press Co.]. Jan. 24. Printing-surfaces; stereotype. - Relates to machines for trimming curved stereotype plates of the kind wherein the plate is trimmed while carried in a rotating drum, and consists in arranging the drum on an inclined axis so that the plate can be fed by gravity, and in the provision of a cooling-device which can be tilted into a vertical position to deliver the plate on to a conveyer. The plate to be trimmed is placed, in the horizontal position, on a table 70 formed of two cylindrical sections 70<a>, 70b connected by a conical section 70<c>, which is mounted on trunnions 69. On tilting the table, the plate slides into a drum 20, mounted in bearings 21, 22 and driven by worm gearing 24 from a sleeve 25<a> on the shaft 26. The movement of the plate into the drum is arrested bv the engagement of a lug on the rear of the plate with a lug on the table 70. The sleeve for driving the drum is connected to the driving-shaft 26 by a clutch, which is thrown into gear by a hand-lever 48 and held in gear during a revolution of the drum 20, after which it is disengaged by a cam on the outside of the drum. As the drum commences to turn, the plate is clamped by ribs supported on arms on shafts 59 which carry arms 62 and rollers 63 running on cams 64 on the bearings of the drum. During a revolution of the drum, the plate is shaved by a fixed internal knife, and the head is severed by a cutter 34 on a shaft 33, driven by a belt 35 and bevel-gearing 28, 29 from the main shaft 26. As the drum 20 comes to rest, the trimmed plate is released and allowed to slide out on to a carrier 82 supported by levers 81 on a shaft 78. The shaft 78 carries a crank connected by a link with a crank on the shaft 86, which is rocked by means of a link from a cam on the shaft 89, driven by worm gear 99 and bevel-gear 94 from the sleeve 25<a>. The plate is arrested on the carrier 82 by stops 106, having in its progress rocked the lever 139 of a cock controlling the watersupply to a perforated pipe, from which water is projected through the holes 137 on to the plate. The stops 106 slide in slots in the carrier 82, and are pivoted to a crank 104, having a bearing in the form of an elongated slot loose on the shaft 78, and a pin 107 resting in a slot 109 in an arm 108 loose on the shaft 78, and connected by a link 111 to a crank 112 loose on the shaft 86 and rocked by a link 113 from a cam 115 on the shaft 89. After the carrier 82 has received the plate, it is rocked into the vertical position, the plate during this movement operating the valve-lever 143 and causing a spray to be projected from the pipe 141 over the plate. The movement of the arm 108 is continued slightly, to allow the crank 104 with the stops 106 to drop and deposit the plate on a carrier consisting of endless bands 126, passing around pulleys on shafts 121, 118, which are driven by a chain 129 from a ratchetwheel operated intermittently by a pawl 133 on the levers 81. The plates are thus delivered standing vertically on the conveyer 126, the valve 143, as soon as the plate has passed, returning to cut off the supply of water and. all the parts returning to their original position to receive the next plate.