Patent GB-281575-A (GB)
Title: Process and apparatus for pickling and otherwise treating metal sheets
IPC: C23G3/00
Filed: 1926-06-16
Abstract: 281,575. Davies, J. C., (Watkins, W. E.). June 16, 1926. Endless-chain conveyers with articles held by grips ; guiding.-In a method of treating metal sheets, the sheets are arched transversely and then fed consecutively through, a bath of dilute acid. the sheets then being flattened and dried. The sheets A are fed one at a time by a conveyer 3 to an edge trimmer and then by rollers 6 to conveyer rollers 7 loosely mounted on shafts 8 carried on a bridge 9 provided with latching devices 10 so that the bridge can be lowered. The sheets are fed by rollers 13 to an arching mechanism comprising a frame 101 having uprights 102 connected by a beam 103. Journaled at its ends in the beam 103, and extending parallel thereto, is a screw-threaded rod 104 on which are mounted blocks 105 each connected to one end of beams 106, the other ends of these beams being mounted in a similar manner on a screwthreaded red 107 extending parallel to a beam 108. By turning the rods 104, 107 the beams 106 may be adjusted relatively to each other. Pivoted at 110 to the beam 103 are beams 109 each of which carries a plurality of stub shafts each carrying a disc 111. The discs 111 are inclined and engage the upper surfaces of the sheets near their edges while the centres of the under surface of the sheets are forced upwards by discs 126. The rear end of each beam 109 is journaled in a block 112 adjustably mounted on the corresponding beam 106 so that the end of the beams 109 can be adjusted independently. The discs 111 are carried by beams 117 the forward ends of are journaled in a block 118 adjustably mounted on the beams 106. The discs 126 are mounted on .shafts 119, the first six of which are mounted on beams 120 pivoted on the first shaft 119 and adjustably supported at its other end by a. beam 123 on the frame 101. The two rear shafts 119 are journaled on beams 125 pivoted at their forward ends on the rear shaft 119 carried by the beams 120 and adjustably supported at their rear ends on the beams 123. As the sheets A pass through the machine, the discs 126 advance and simultaneously arch the sheets, the discs 111 holding down the edges of each sheet. The edges of the arched sheets are now engaged and held by the fingers 162 of arms 161 which form part of links connecting two sprocket chains 160 and are carried by a truck 170, Fig. 8, provided with vertical wheels 163, 165 which roll along a track 166 and are kept in position by the engagement of the wheel 163 with a track 167. The truck 170 is also provided with an horizontal wheel 164 engaging vertical tracks 168, 169 and is carried by a block 171 adjustably mounted on a screwthreaded rod 172 so that its position with regard to the pickling tank 136 may be adjusted. The washed sheets are fed by the conveyer to discs 184 similar to the discs of the arching mechanism but arranged oppositely thereto so that the sheets are flattened and then pass over a bridge 185 similar to the bridge 10, being then fed by rollers 187 between the rollers 186 of a drying apparatus. Specifications 281,349, and 281,577, [Class 83 (iv), Metals, Working], are referred to.