GB165323A - Improvements in sheet separating machines - Google Patents

Abstract

165,323. Mills, C. K., (Dexter Folder Co.). June 11, 1920. Sheet-separators; pile supports for sheet feeds. -Sheets are separated from a pile. on a support by means of a sheet-engaging device arranged above and at a distance from the top of the pile, a portion of the pile of sheets being raised periodically into the sphere of action of the sheetengaging device which displaces the top sheet and brings it into a position to be engaged by movable sheet-gripping means, which, as described, takes the form of a reciprocating sucker. A movable holding-down device, and means for blowing air under the separated sheet are also described. As shown, the sheet-separating devices are mounted in a vertically adjustable manner in a frame carried by a bracket 3 which is adjustable longitudinally along a rack 2. The devices are mounted on or are operable by cams on a shaft 11 driven by bevel gearing from a shaft 15. The sheet-engaging device consists of a combing- sector 12 mounted on the shaft 11, and a portion of the sheets are raised into contact with this sector by an oscillating curved lever 18 which is oscillated by a. cam 32, roller 31, link 29, and is normally pressed towards the pile by a spring- pressed rod 22 controlled by an adjustable spring 26 acting on a guide 24 through which the rod 22 passes, this guide being provided with trunnions 23 journaled in arms 21 on the shaft 17 about which the lever 18 pivots. When the cam 32 permits, the spring 26 presses the lever 18 into the position shown in Fig. 4, and raises the corner of the pile. The combing-sector 12 then acts on the top sheet and straightens it out as shown, thereby separating it from the rest of the pile. An oscillating sucker 39, carried by a lever 35 oscillated by a cam 40 acting on a roller 41. then seizes and raises this sheet, until it is seized by sheet forwarding means. Other sheets are prevented from adhering to the top one by blasts of air directed by a tube 56, and by a curved holding-down device 45 which is given combined reciprocatory motions, in vertical and horizontal directions, by a cam 54 which oscillates a lever 49 in which the device 45 is pivoted, a fixed pin 44, engaging a slot 47 and a cam 46 in the device 45, assists to govern the movements of the holding- down device. A spring 52 serves to keep the roller 53 of lever 49 in contact with the cam 54, and to control the turning of the device 45 about its pivot 48 on the lever 49. The device .45 is moved forwards and downwards after the top sheet is separated, and is subsequently moved upwards and backwards.