Patent GB-669937-A (GB)
Title: Improvement in machine for making inlaid linoleum
IPC: D06N7/00
Filed: 1949-08-23
Abstract: 669,937. Making inlaid linoleum. PESCI, T. Aug. 23, 1949 [Nov. 8, 1948], No. 21948/49. Class 140. Inlaid linoleum is made by applying a layer of a linoleum mixture to a travelling web of backing material, causing part of the layer to adhere to the material in accordance with a key pattern, severing the layer along lines bounding the key pattern, removing the severed portions, and replacing them by selected linoleum components registering with the key pattern. A travelling web of backing material 10 is impaled at stage A on the pins 14 of two intermittently moving conveyer bands 12, which run on either side of the bed 11, by two transversely connected weights 15, which are caused to rise and then allowed to drop upon the edges of the web by a lever and cam mechanism. A key. pattern of glue is now printed on the web at stage by a vertically reciprocated platen 22, which has on its lower face a cameo pattern which is coated with glue by a roller 30 mounted transversely above a receptacle 31 which is traversed under the platen 22 while the latter is raised. A layer 52 of linoleum mix is now applied to the backing 10, and both pass under a roller 54 to stage C, where a vertically - reciprocating head 59, having mounted on its lower face cutters corresponding to the key pattern and surrounded by cushioning mats of sponge rubber, severs the portions of the mix which are not to be part of the final inlay pattern, while pressing the remainder against the glued pattern. The severed portions are removed at stage D by suction lifting means which deposit them on platforms on movable trucks secured alongside the conveyer, and are replaced at stage E by portions of similar shape by a suction lifting means like that at stage D, but so operated as to lift pre-arranged portions of mix from a platform and deposit them in the vacant places on the backing. The inlaid material then passes under a vertically-reciprocated cold or heated platen 224 at stage F. A continuously-driven main shaft 68 running the length of the machine provides a co-ordinated drive for the various stages. The weights 15 of stage A are raised and lowered by cams 20 on a shaft 21 on which a cam 41 is also mounted for movement of the glue receptacle 31 through cam rollers 40, 42 which are held in contact with the cam 41 by yokes 46 and arms 44, lever 37 and link 36. The glue-applying roller 30 is positively rotated by a gear mounted on its shaft, which meshes with a further gear engaging a fixed rack. The platen 22 of stage B is mounted on vertical slides 24 and reciprocated by a cam 26, which is driven from a shaft 57 from which the drive to the roller 55, which forwards the linoleum mix, is also taken. Stage C comprises a head 59, counterweighted by weights 62 and vertically-reciprocated by yokes 64 which extend between heavy pins 63 on the heads 59 and eccentrics 65 keyed to shaft 66 which is driven through gearing from the main shaft 68. The head 59 has secured to its lower face removable knives and cushions for cutting and pressing the key pattern. Stage D comprises a pair of interconnected skeleton frames 77 which straddle a length of the pattern area, extend on either side of the web, and act as guides for beams 78, 78<SP>1</SP>, which are suspended from series of lift rods 80, 801. The upper ends of the latter are pivoted to arms of bell-cranks 81, 81<SP>1</SP>, the other arms of which carry rollers 85, 851 which follow cams 86, 86<SP>1</SP> and thus lift the beams 78, 78<SP>1</SP>, on which duplicate suction-box units 88, 89 run transversely of the web as shown in Fig. 12, on wheels 91. The underside of each box unit is provided with staggered perforations communicating through tubes 94 with bellows suction heads 95. The interiors of boxes 88, 89 are connected respectively to valve chests 100, 125 and to exhaust fan chambers 102, 127 by pipes 101, 103, having a pivot joint at 104, and 126, 128 pivoted at 130. The valve chests have valves which normally connect the nozzles 95 to the source of vacuum, but are caused to vent them to atmosphere when the boxes are in the lowered, discharge position, by a tappet 121, on an arm on a rock-shaft 110, contacting a stop 122. The boxes 88, 89 are connected by yokes 131 having slots 129 in which a cross-head 132 slides. The cross-head is suspended from a pivot 134 by a frame 133 in which is mounted a cam roller 135; a second cam roller 140 is mounted on a spindle 138 supported by yokes 137 and rock-bar 141, and an interposed cam 143, keyed to shaft 139, transmits motion to the frame 133 and thus to boxes 88, 89. Trucks 92 and 93 which alternately receive the removed components, are rolled into position on either side of the web, and there locked. Each truck has a perforated top-plate 145 supporting a similarly-perforated transfer-plate 146; pins are inserted in the perforations in a pattern conforming to form supports for the removed components, and the plate 146 is gradually lowered as stacking proceeds by toggles 157 operated by reverse-threaded spindles 163 driven by a ratchet-wheel 166, and a pawl 167 which is reciprocated by a cam 172 on a shaft driven through reduction gearing and the shaft 186 from the main shaft 68. A hand wheel 177 is provided for re-setting. The web now proceeds to stage E which is similar in construction to stage D but is so operated that the suction heads pick up from trucks on either side a pre-arranged pattern of components, corresponding to the pattern removed at stage D, and deposit them in the vacant spaces on the web. They are pressed into the linoleum mix at stage F by the heated or cool platen 224 of a cam-operated press. Each conveyer 12 is an endless steel band provided with lugs 228 which engage notches 227 in a wheel 226 which is keyed to shaft 230 and is driven stepwise by a pawl 233 engaging a ratchet-wheel 232. The pawl 233 is mounted on an arm 234 which is pivoted on shaft 230 and carries a rack gear'235 engaging an arcuate rack 236 on an arm 237, pivoted at 238, and carrying a roller 240 following a continuouslydriven cam 241. The wheels 226 are locked in each rest position by a bolt 245 entering a notch 244 of a keeper 243 on a hub keyed to the shaft 230. The bolt 245 is mounted on a rock-arm 246, pivoted at 238 and carrying a roller 248 following a cam 247, keyed to the same shaft 242 as the cam 241.