Patent GB-479036-A (GB)
Title: Improvements in and relating to typographical slug casting machines
IPC: B41B11/72
Filed: 1936-07-28
Abstract: 479,036. Type-bar-making machines. CLEMO, F. A. (Mergenthaler Linotype Co.) July 28, 1936, No. 20892. [Class 100 (iii)] Trimming type-bars.-Blank parts are severed from type-bars as they are ejected from the mould by a rotary power-driven saw, which is changed in position automatically to accord with the condition of the composed line, this being effected by a special blank matrix contained in the line. The device is described as applied to a machine in which the line is composed in a hand-stick, and thereafter transferred into a transporter, which presents the line to the mould. The line is delivered to the transporter from a table 104, Fig. 8, by means of a manually operated carriage 101 having depending fingers 107, 107a, between which the line is positioned. The special matrix 129, which determines the position of the saw, has a downward projection 130, and is usually located just ahead of the first type-producing matrix in the line. The saw 134, Fig. 27 is normally located in an uppermost position, and is moved downwards to cutting position by a spring 217 under the control of a cam 216. The saw is mounted on a vertically sliding carriage 140, to which the cam-lever 141 is connected. The setting of the saw is controlled by a horizontally sliding gauge-plate 139, Fig. 8, having an inclined lower edge with which co-operates the inclined upper end of a vertically sliding bar 142 connected to the cam-lever. When the cam rotates, the spring 217 draws down the cam-lever until the bar 142 meets the gauge-plate. The gaugeplate is carried by a slide 143, which is moved to the left by the projection 130 of the special matrix as the line is moved into the transporter. The saw is secured to a vertically movable shaft 145, which is splined into a sleeve 155 rotated from a shaft 164a. The shaft 164a is driven through a friction clutch 169 from a rotating flexible shaft 187. The clutch is allowed to close, in order to drive the saw, by the action of an eccentric 202 on the shaft of the cam 216. The slug, after ejection from the mould, is drawn past the saw by a gripper in the form of a yoke 254, Fig. 30, the arms 255, 256 of which are equipped at their free ends with spring-hinged claws 260, adapted to engage over the ends of the slug. The yoke is moved horizontally by a lever 269 and a cam. The slug is supported by a backing- up finger 287, which engages its rear edge. The lower, or blank, portion of the slug is pushed off the saw by a telescopic pusher, and the upper, or type-bearing portion falls into a shoot 137 leading to a galley. The ordinary front guide, against which the slug strikes on ejection is replaced by a gate 136, which is pivoted on a vertical axis, and is closed, against the action of a spring, when a full-length slug is to be cast. The slug is thereby directed into the regular delivery shoot 127. The parts are operated from a constantly rotating shaft through two clutches, one of which makes a single rotation during each sawing operation, and the other, two half-rotations, one before and one after the rotation of the first clutch. The movement of the slide 143, Fig. 8, to the left by the special matrix starts the half-rotation clutch, which effects the opening of the gate 136, the engagement of the saw-driving clutch, and the adjustment of the saw. The movement of the slugejector starts the one-rotation clutch, which operates the slug-gripper, the backing-up finger, and the waste-slug pusher. The removal of the matrix line from the transporter releases a brake for the slide 143,- which is returned to the right by a spring. The halfrotation clutch is thereby again started, and acts to stop the saw and to return the parts to initial position. When a full-length slug is to be cast, the line will contain no special matrix, and the half-rotation clutch will therefore not be actuated. The one-rotation clutch would, however, be put in action by the ejector, and, to prevent this, the clutch is arranged to be operated through n friction clutch, which is closed only when the line contains a special matrix.