Patent GB-165239-A (GB)
Title: Apparatus for embossing or graining and mounting lithographic and other prints and the like
IPC: B05C1/08
Filed: 1920-04-01
Abstract: 165,239. Steedman, H. P. G. April 1, 1920. Embossing.-Relates to machines for continuously affixing sheets of paper &c. to canvas and like mounts, of the kind in which the sheet of paper to be mounted is carried round a cylinder, coated with adhesive, and then fed in exact register with the mount to which it is to be attached between said cylinder and an adjacent cylinder, and consists in the provision of means for embossing or graining lithographic and other prints, leather, &c., and simultaneously mounting them on canvas or other backing, such means being particularly adapted for producing mounted reproductions of oil paintings prepared according to the process described in Specification 15108/11, wherein lithographic prints in colours to reproduce the oil painting are mounted on canvas, &c. backing, and then embossed so as to imitate the canvas grain, brush marks and varying paint levels of the original. Means are also provided for feeding the backing material in the form of a continuous web, for severing therefrom pieces of the required length, and for feeding such pieces to the embossing-rollers in registration with the adhesive-coated prints, &c. In the arrangement shown, the prints &c. to be mounted and embossed are carried into the machine by an endless carrier 5 provided with cross-bars 6 having grips or pins 7 to grip the succesive prints, the backs of the prints being coated with adhesive by a roller 18 supplied from a trough 13 by means of distributing-rollers 14, 16, 17. If the print is incorrectly fed, the adhesive roller 18 may be tripped by means of cams 19 operated by links 20, 21 from a shaft 22 provided with a hand-lever. The adhesive-trough and its distributing-rollers are mounted on a carriage 98 adapted to be moved by a pinion 100 along rack bars 99 to give access to the interior of the machine. As the gummed print enters the bite of the embossing-rollers 3, 4, a piece of backing-material is fed in exact registration therewith, severed by means of cutters 52, 53, on rotating cutting-rollers 35, 36, from a continuous web 28 of canvas or other backing, and forwarded to the embossing-rollers by the feed-rollers 37 - - 43. The web 28 is fed to the cutting rollers by the other feed-rollers 31, 32, 33. Of these two sets of feed-rollers, the roller 33 and the rollers 38, 40, 42 are positively driven by bevel-gearing and change-gear wheels from the shaft of the lower embossing-roller 3, the other feed-rollers rotating frictionally. The cutting- rollers 35, 36, which are geared together and spaced a sufficient distance apart to enable the backing-material to be fed between them at different speeds according to the lengths of backing- material to be severed, are driven by fixed gearing from the upper embossing-roller 4 so that each severed piece is fed between the embossing- rollers in correct register with each gummed print. By changing the gear-wheels between the shaft of the roller 3 and the bevel-gearing that drives the feed-rollers, the rate of feed of the web of backing-material may be varied so as to vary the length of the severed pieces. The feed-rollers below the cutting-rollers are arranged to exert only a light pressure on the severed pieces in order to permit the embossing-rollers, which are moving at a higher speed, to withdraw the severed strips without tearing or stretching. When the machine is used for mounting prints of less width than the usual width of the roll of backing- material, a slitter 72 is provided to divide the web longitudinally, one part passing into the machine, and the other part 28a being led away and rewound.