Patent GB-451903-A (GB)
Title: Improvements in or relating to sheet separating devices for sheet feeding machines
IPC: B65H3/08
Filed: 1935-12-18
Abstract: 451,903. Feeding sheets. SPIESS, G., 78, Zschocherschestrasse, Leipsic, Germany. Dec. 18, 1935, No. 35154. [Class 100 (i)] In a sheet-feeding apparatus of the kind described in Specification 449,133 in which the rear edges of the sheets are acted upon by air blasts from nozzles 21, by means of suction separators 14, the movements of which are controlled by a piston in a cylinder 3 connected to the suction conduit leading to the suction separators, and a presser foot 30 is moved by a linkage system to engage the pile below the top separated sheet and acts to blow air beneath the separated sheet and also to control the pile feed, a lifting bar 43, which is arranged to be actuated by a, cam 50 as in Specification 449,133 is arranged to effect all the operations of the separators 14, and the blowing device 30 other than the tipping movements of the separators 14 which are effected by the cylinder 3. The separating action begins when the parts are in the position shown in Fig. 1, and the cylinder 3 is then connected by a groove 97 in a valve 96 with the suction conduit 98 which also connects with the nozzles 14. A piston 5 is thus moved against the action of a spring 5<a>, and by means of links 102, 101 and lever 100 the nozzles 14 are tipped to bend up the rear edge of the sheet. The bar 43 is now raised. by means of the cam 50, and by means of a system of linkages operated from a roller triangle 121 mounted on the bar 43, the nozzles 14 are raised vertically and then advanced along the line 14<a> to forward the sheet into feed rollers, and the blower 30 is first moved horizontally and then given a vertical falling movement along the path 30<a>. The triangle 121 is connected to a lever 120 pivoted at 119 to an adjustable support 1 which carries the separating devices, and the lever 120 operates a link system 118, 117, 113, 112, 114 for controlling the movements of the parts 14, 30. The bent lever 112 is connected by a pivot 111 to a lever 104 for moving the nozzles 14, the path of the pivot being indicated by the dotted lines 111<a>. The lever 112 is fitted with a pivot pin 129 which moves in the path 129<a> and operates the linkage for controlling the blower 30 by means of a link 128 fitted with a plunger 132 which acts on a roller 133 on one arm of a lever 23 which with a link 26 forms the linkage for controlling the blower 30. After the plunger 132 has passed the roller 133, a spring 126 is operated by the link 128 to cause the arm 23<a> of lever 23 to advance under spring action. The lever 23 also operates a lever 135 having a pin-and-slot connection with the valve 96, and when the valve 96 reaches the position shown in Fig. 4, the cylinder 5 is connected to atmosphere via a port 138, and the piston 3 moves under spring action to return the nozzles 14 to horizontal position, and finally the lever 120 and associated link system moves the sheet towards the feed rollers. The angle of dip of the nozzles 14 is controlled by an adjustable stop 123 which limits the motion of link 102. The extent of drop of the blower 30 under spring action, which is determined by the position of the pile, controls the extent of motion of the valve 96 and thus regulates the position of an arm 143 on the valve 96 which is caused to actuate a valve 141 for controlling the pile-raising gear operating as described in Specification 449,133.