Patent GB-265758-A (GB)
Title: A new or improved machine for affixing sheets of paper or the like to boards, cards or like mounts
Filed: 1926-01-16
Abstract: 265,758. Ratcliff, W. D. Jan. 16, 1926. Affixing by adhesives; combining sheet material.-In a machine for affixing paper sheets to boards &c., the paper sheets, to prevent warping, are fed and carried horizontally, being held stationary while the adhesive is applied by reciprocated rollers which lift from the paper during the idle movement. Paper sheets are fed from a table 11 to rollers 5, 6, and over a fixed plate 22 by an endless belt 12, to mounting rollers 7, 8. The adhesive is applied to the paper, by a sectional roller 37 from a mucilage trough 50 through rollers 32, 33. Blocks 30, carrying the rollers, are reciprocated in slides 21 in the frame by link mechanism and a pinion 66 which engages a quadrant 68, rocked from the main shaft. Pinions 41 loosely mounted on the roller shaft 31 engage fixed racks 42 so that when the blocks 30 reciprocate, the pinions 41 are rotated. Spring-controlled pawls 43 on the pinions 41 engage ratchet wheels 44 rigidly secured to the shaft 31 to rotate the rollers only in the forward movement. During the return movement, the roller 37 is lifted from the paper by eccentric shafts 54, which are operated by a cam device from the main shaft to raise a shaft 51 secured to the end plates 35 carrying the rollers. The lower mounting roller 8 is driven from the main shaft through an oscillating quadrant 74, the roller 8 receiving one complete revolution during half a revolution of the main shaft and being held by a ratchet 82 during the other half revolution of the main shaft. The upper roller 7 has a cut-away part 7<c> which is presented to the roller 8 during its stationary period so that boards may be fed down the incline 91 to stops 92, which are drawn back to an inoperative position by a cam 99 on the main shaft, shortly after the rollers 7, 8 begin to rotate. Means for holding the paper sheets to the belt 12 during the application of adhesive comprise a suction pump 102 drawing air through holes in the plate 22, the suction being released by a cam-operated valve, and a gas heater 122, mounted between the plate 22 and the rollers 7, 8, is adapted to evaporate superfluous moisture from the adhesive before the paper is applied to the board. In operation, the paper sheet is fed by the rollers 5, 6 to the belt 12 which is driven from the main shaft through the quadrant 74, and the roller 8. The belt carries the paper over the plate 22 until the leading edge of the paper passes the suction holes when the rollers 7, 8 cease revolving, the belt 12 then remaining stationary for a half cycle. The rollers 32, 33, 37, which have been moved forward over the paper by the quadrant 68 with the rollers 37 out of contact with the paper, now return, the rollers rotating to spread adhesive on the paper and the cam device and the shafts 54, allowing the roller 37 to contact with the paper. The roller 8 then carries the paper forward over the heated chamber- 122 where it pauses for half a cycle. The board is then fed down the incline 91 to the stops 92 which, on further movement of the rollers 8, are withdrawn, the board and paper being pressed to. gether by the rollers 7, 8, a final pressure being applied by rollers 9, 10.