Patent GB-938209-A (GB)
Title: Improvements in or relating to sheet registering apparatus
IPC: B65H9/04
Filed: 1961-08-25
Abstract: 938,209. Feeding sheets. MIEHLE-GOSSDEXTER Inc. Aug. 25, 1961 [Sept. 2, 1960], No. 30756/61. Class 100 (1). Sheets fed over a table 16 are registered by oscillating front stops 20 on a transverse shaft 65 carried by the table platform, and means are provided for adjusting the stops to accommodate sheets which have front edges which are not cut perpendicularly to the sides thereof or are curved convexly or concavely. The table 16 can be bodily adjusted forwardly or backwardly, or skewed in the plane of the sheets to adjust all the stops 20, and the centre of the shaft 65 can be bowed forwardly or backwardly relative to the ends thereof to adjust the centre stops relative to the end stops. Registration is facilitated by a longitudinally-arranged spring 135, Fig. 9, secured centrally of the rear of the table and adjustable by a screw 137 and nut 136 to bow upwardly the central part of the rear of each sheet. The table 16 is secured on a platform comprising sides 10, 11, front 12, rear 13, and cross-pieces 14, 15, and sheets are carried over the table, by a number of endless belts 17 on rollers 18, and drop rollers 133, up to the stops 20 where they are gripped by grippers 19 on a sheet transfer device. Side registration is effected by side guides 21 arranged in a recess 23 of the platform on cross-bars 22 supported on the machine frame independently of the platform. The platform is pivotally supported at the front end by links 26 on the machine frame for adjustment relative to the grippers 19. The sides 10, 11 at the rear of the platform are enlarged at 30, Fig. 1, to receive eccentrics such as 31 which can be rocked about a stub shaft 33 by a lever 36, link 44, and lever 46 from a crossshaft 42. The lever 46 is slotted at 49 to receive a locking screw 51. The opposite eccentric is also connected by a link to the shaft 42, and a further lever is secured to the shaft on the same side of the platform as the lever 46 and is also slotted to fit over a locking screw. A third lever 48 fixed on the shaft 42 is slotted to fit over a locking screw 54. By unscrewing the various locking screws it is possible from one side of the apparatus during the sheet feeding operation to adjust manually either or both of the eccentrics to move the table 16 bodily or to skew it in the plane of the sheets; since the shaft 65 carrying the front stops 20 is carried at the front of the table, the stops are correspondingly adjusted. A calibrated scale (58, Fig. 3 not shown) on the frame side 10 facilitates adjustment of the eccentrics. A pivot 59 on a stationary part of the framework fits between guide blocks 62, 63 on the front 12 of the platform to eliminate lateral movements of the platform during eccentric adjustments. The shaft 65 can be bodily raised or lowered as well as rocked to impart a compound motion to the front stops 20, and is rotatable in three bearing brackets 66, 67, 68 formed on arms 69, 70, 71. The brackets and shaft 65 are oscillated by arms 77 from a shaft 78 which is oscillated from a cam 81 on a shaft 82, and the shaft 65 is also rocked about its run axis by a lever 94, link 95, and a bell-crank 97 which is pivoted to the centre arm 70 and is oscillated by levers from the shaft 82. The outer arms 69, 71 of the brackets 66, 68 for the shaft 65 are pivoted on pins fixed on the cross-member 15 of the platform, but the arm 70, of the centre bracket 67 is pivoted on a pin 76 in a slot in a bracket secured to the member 15, and the pin is secured to screw-threaded block 110 which can be moved by a screw connected to a shaft 116 to adjust the position of the pin 76 in its slot. Thus the pin 76 and arm 70 can be moved forwardly or backwardly to bend the shaft 65 and adjust the centre front stops 20 relatively to the outer ones to accommodate sheets having curved front edges. The shaft 116 is connected by worm gearing 118, 119 to a cross-shaft 121 which can be rotated manually by a knob 122, Fig. 1, at one side of the machine. Adjustment of the degree of the shaft bending is facilitated by a calibrated scale on a wheel which is rotated by gearing 127, 128, 131 from the shaft 121.