Patent GB-911045-A (GB)
Title: Machine for the manufacture of composite mosaics
IPC: B27M3/04
Filed: 1959-02-17
Abstract: 911,045. Laminating; rollers. ROLLTEX A.G. Feb. 17, 1959 [Feb. 18, 1958], No. 5486/59. Classes 42 (2) and 140. [Also in Group XXX] A machine for the manufacture of mosaics comprises a shoot for collecting together randomly disposed mosaic blocks and directing them to channels arranged side by side, each channel comprising a first section arranged to sort from the blocks, those which have a predetermined disposition, and to guide them to an outlet section of the channel arranged to discharge the blocks into supports provided on the periphery of a rotatable drum and arranged each to hold one block, a device for guiding a strip of support material, provided on one side with an adhesive, and for pressing the adhesive-bearing side of the strip against the blocks in the supports, and a drying device extending around at least a portion of the drum periphery. As shown in Fig. 1, blocks K, e.g. of wood, are carried by conveyer 1 to a hopper 2. At the bottom of the hopper is a vibrator 11, which causes the blocks to pass over the sieve 11a to remove dust and to an inclined slide plate 12 and thence to guide pieces 13 (see Group XXX) which sort out those blocks having a predetermined orientation. The misoriented blocks are collected by the shoot 18 and returned by the conveyer belt 19 and shoot 20 to the hopper 2. Correctly oriented blocks pass down the channels R and RT and are laid (see Fig. 15) in fields bounded by ribs 26 on holding pieces 25 forming the surface of the drum T, which is rotated in the direction shown by the arrow (Fig. 1). A strip 46 of support material, e.g. jute, is taken from a stock roll and through a device 49 that tensions it and applies adhesive to the side facing the drum T. The pressure roller 47 presses this band on to the blocks on the drum. Drying of the adhesive, e.g. by highfrequency heating, takes place along the section 50, and the resulting water-vapour drawn off by the device 51. The blocks and band are cooled by an air cooler 52, and the completed mosaic carried to a table 54 where it is trimmed and cut to size. An alternative means for laying the blocks on the drum is also deseribed (see Group XXX). As shown in Figs. 12, 13 and 15, the surface of the drum T comprises a large number of holding pieces 25, each having a T-shaped rib 26 of a height less than the thickness of a block K so that the ribs of adjacent pieces form fields in which the blocks will rest. The root of each holding piece has two concave recesses 30, so that they may be slid one behind the other between stays 31, parallel to the axis of the drum 32 (Fig. 13), is a spoke of the drum 32. A block 33 is pinned therein, and a guide-bolt and two plate segments 35 are attached by a bolt 36. The tubular stays 31 are mounted on these segments by screws 37. A sleeve 39 and spring 38 on each stay hold the pieces 25 in place. Segments 40 mounted on the sleeve 41 support the stays 31. The sleeves 41 are surrounded by sleeves 42 of electrically -insulating material. The segments 40 and pieces 25 are of the same insulating material, so that the drum may be used with the high-frequency drier.