Patent GB-296699-A (GB)
Title: Improvements in or relating to automatic feeding and delivery devices for embossing presses for paper, cardboard, leather or the like
Filed: 1927-11-07
Abstract: 296,699. Mansfeld, C., [Firm of]. Sept. 5, 1927, [Convention date]. Feeding sheets. - Sheets are fed automatically to and from embossing and printing presses by mechanism comprising a single set of grippers 28, 30 adapted to feed the sheets across the platen 1 and return to their sheet-receiving position during the embossing &c. operation without passing around the upper beam of the main frame of the press. Sheet-carriers; registering-devices; feed-tables; gripper mechanism.-The sheets are fed over a table 9, which can be swung aside about hinges 10, and are guided by a side guide 11 and registered against front stops 56 connected by lever mechanism 55 - - - 51, to the shaft of an arm 21 of a parallel lever system which controls the opening of the feed grippers 28, 30, so that the stops are raised when the feed grippers are open, and vice versa. The grippers are mounted in slides 20 attached to chains 35 operated by a sprocket on a vertical shaft 36 which is oscillated by bevel gearing driven by an oscillating shaft 42 operated by a reciprocating rack 41 adjustably connected at 45 to a lever arm 40 coacting with a cam 38 on the main cam shaft 4, which also operates toggle mechanism for raising the platen 1. The slides 20 move in guides 19 which are mounted in frames formed of brackets 16 connected by battens 18, the brackets being mounted to slide on rods 12, 14 on either side of the platen, and being transversely adjustable by right-and-left hand screws 13, 15 simultaneously operable by a hand-wheel and a sprocket and chain 17. To adjust the grippers for small variations of the widths of the sheets, they are laterally adjustable in the slides 20 as shown in Fig. 4. The guides 19 are raised and lowered relatively to the battens 18 by means of parallel levers 21, 22, and an oscillating shaft 27 operated by cam-and-lever mechanism 23, 24, 25. The sheets are fed to the grippers when these are maintained open as in Fig. 2 by the action of a lever 33 on a wide projection 31 on the gripper shaft. The lever 33 is controlled by a roller 34 resting on a batten 18, and as the guides 19 rise relatively to the batten, the lever 33 moves clockwise and permits the grippers to close under spring action. The chains 35 move across the platen and then the grippers open to deposit the sheet in other grippers which retain the sheet during the embossing operation, and then the chains return while the embossing operation is being effected, the slides 19 being lowered to open the grippers and maintain them open until a new feed is to be effected. In a modification. Fig. 10, the sheets are fed by grippers and arranged on chains at the side of the platen, and adapted to be moved intermittently in two stages, one to carry the sheet to the delivery grippers, and the other to return the grippers to feed position. The chains are driven from a ratchet wheel 94, Fig. 10, rotated intermittently by a pawl 95 on a lever 96 oscillated by cam-andlever mechanism 97, 98, 100. The delivery grippers 102 are mounted on oscillating arms operated by cam-and-lever mechanism 104, 105. 106, 107. 109. In other modifications, the gripper chains are arranged to move in horizontal planes, and may be guided through openings between the head 7 and the heating box of the press. Delivery apparatus; gripper mechanism.-The delivery grippers 67, Fig. 7, are mounted in laterally adjustable supports 63 on arms 60, 61, connected to carriages 59 fitted with rollers 62 moving in guides 58. The carriages are reciprocated in the guides by sprocket chains 81, Fig. 1, driven from a shaft 87 which is oscillated by a reciprocating rack 88 operated by a lever 90 and cam 91. The shafts 66 of the grippers 67 are longitudinally adjustable, and the grippers are opened against spring action by a projecting arm on a shaft 72. The shaft 72 is controlled by a roller arm 73 which engages a cam groove 75 in the track 58 to open the grippers against spring action. A spring-latch 77 engages an arm 74 on shaft 72 to hold the grippers open, and on release of this latch by a fixed cam slope, the grippers close to take the sheet from the feed grippers. In a modincation the control of the delivery grippers may be effected by the feed grippers.