Patent GB-343602-A (GB)
Title: Improvements in mechanism for selecting, handling and refiling printing plates or other articles
IPC: B41L47/58
Filed: 1929-11-26
Abstract: 343,602. Selecting and handling printing-plates &c. BABER CO., 110, State Street, Boston, U.S.A.-(Assignees of Baber, J. L.; 110, State Street, Boston, U.S.A.) Nov. 26, 1929, No. 36212. Convention date, Nov. 27, 1928. [Classes 100 (ii) and 100 (iii)]. Setting and distributing type; addressing-machines.-A mechanism for selecting, handling, and re-filing articles, particularly adapted for handling printing-plates for use in addressing-machines, comprises a magazine having a plurality of pockets each adapted to contain an article, and means for selecting and removing articles from certain of the pockets, and for re.filing the articles in the pockets from which they were removed. The selecting means comprise a control or master plate having a number of control factors, the setting of which is varied at the will of the operator. When the articles handled are printing-plates, these may each comprise a frame 60, Fig. 3, within which is mounted a stencil 61, the frame having notches 62 at its ends and a recess 63 at one side for co-operation with the magazine and extracting means. The printing-plates are contained in a magazine in the form of an intermittently rotated drum 75, Fig. 6, provided with radial flanges to form pockets 88, each of which receives one plate. The plates are held in the pockets by a stationary peripheral hoop 99, which enters the depressions 63, Fig. 3, of the frames 60. The hoop 99 has an open portion, which can be closed by a hinged section 101. The magazine is removably mounted on an annular hub 125, which projects from the face of a ratchet wheel 126, rotatably supported on a standard 128. The magazine is held in place by a hinged gate 135, Fig. 4. The ratchet wheel 126 is intermittently rotated, through a distance corresponding to ten pockets at a time, by a pawl 140 on an arm 141, which is reciprocated by a rod 145 and a cam 190. The required printing- plates are extracted from the pockets by a set of ten grippers 160. Each gripper comprises a pair of pivoted fingers having pins at their outer ends, which, when the fingers are moved towards each other, enter the notches 62, Fig. 3, in the printing- plate frames. The grippers are mounted in a carriage 170, which is reciprocated by a lever 183 and the cam 190. The plates extracted by the grippers fall into a hopper 210, in which they are arrested by a pair of pivoted gates 211, which are then retracted, to allow the plates to fall to the bottom of the hopper. The grippers are selectively operated, so as to extract from the presented group of ten printing-plates only those plates which are required, by a series of electromagnets 175, supported on the carriage 170. The circuits of the magnets are controlled by a master-plate 225, Fig. 4, which is removably secured to the magazine 75, and contains a number of rows of slots, formed by tongues punched out of, but remaining attached to, the plate. The tongues are either bent away from the plate, or are depressed into its plane, so as to close the slots, in accordance with the printing- plates which are to be selected. With the masterplate co-operates a row of strips 235, carried by a rocking shaft and provided with studs, which either pass through the plate or make contact therewith, according to the position of the tongues. The studs that fail to pass through the plate complete the circuits of the magnets 175 that operate the grippers. The master-plate may be of brass, and may be imperforate and have attached to it a disc of paper &c. in which selecting-perforations are made. The printing-plates are fed from the hopper 210 by any suitable feeding means to the printing-mechanism 51, Fig. 2, and thence to a second hopper 300, from which the plates are returned to the pockets of the magazine from which they were taken. The magazine is removed from the hub 125, and is placed upon a second hub 301, situated below the table 54 that supports the printing-mechanism. The plates are removed from the hopper 300 by ejector mechanism comprising a slide 316, Fig. 22, which is reciprocated by a lever 333, and supports an ejector-bar 377 carried by pivoted arms 376. The bar 377 normally passes below the lowest plate in the hopper 300, but, when raised by the action of an electromagnet 385, it engages the plate and inserts it into a pocket of the magazine. To ensure the delivery of the plate to the proper pocket, the circuit of the magnet 385 is controlled from the master-plate through a series of stud-carrying strips 390, similar to those employed for the selection of the plates. The studs are, however, arranged in a straight line, so that only one of them at a time can engage a slot in one of the curved rows of slots formed in the master-plate. The magazine is intermittently rotated by ratchet-mechanism, by which it is fed through the distance between two adjacent pockets at each operation.