Patent GB-349075-A (GB)
Title: Improvements in or relating to the manufacture of inlaid cloths
IPC: D06N7/00
Filed: 1930-02-17
Abstract: 349,075. Inlaid linoleum. BATTEN, E., 103, High Street, Beckenham, Kent. Feb. 17, 1930, No. 5293. Convention date, Feb. 18, 1929. [Class 140.] In making inlaid linoleum by the process employing rotary cutting cylinders operating on sheets of plastic material, the selection of the pattern units to be rejected from each sheet is effected bv a single pattern roll associated with each cutting cylinder, successive rotations of the pattern roll operating variably to reject units so as to vary the pattern with successive rotations of the pattern roll. In the apparatus described, certain portions only of the circumference of the pattern roll operate on the ejectors of the cutting cylinder druing one revolution of the pattern roll, the number of equal operative parts of the pattern roll being such as not to be divisible without remainder by the number of ejectors operated in one revolution. The general arrangement of the plant is shown in Fig. 1. Each of the four units W, X, Y, Z comprises caldendering mechanism A, a conveyer C, and cutting and pattern selecting mechanism D. Plastic material of different colour is fed to each unit, rolled into a sheet by the calenders, and deposited on the conveyer C. To avoid stoppage in case of a break, endless bands 1, 2 support the Sleet in passing from the rolls 3 to the cooling roll 4, and from the latter to the conveyer C. The sheet then passes around the guide roll 5 to the cutting cylinder D. This is of the usual pattern, as shown in Fig. 2, supported on rollers 9 and further rollers at the sides. The rollers 9 are resiliently mounted. At each end of the cylinder are provided roller tracks 16 and gear teeth 17. Internal gear teeth are provided at one end of the cylinder to drive the rolls located within the cylinder. The surface of the cylinder is provided with a series of knives 24 which outline the pattern units. Ejectors comprising heads 25, Fig. 7, stems 26 and plungers 27 are provided for each pattern unit, the stems sliding in radial holes in the cylinder, springs being provided which tend to retain the ejector in normal position. A pattern roll G is located within the cylinder, driven by the internal. gears thereof, and is provided with studs which actuate the ejectors. These studs are removably located in holes 30. In the present case, three sets, H<1>, H2, H3, of studs are used, and the proportions of the parts and gearing are so arranged that during each substantial ] evolution of the roll only one set of the studs will be effective. Opposite to the pat. tern roll and outside the cylinder is the usual rotary brush or similar mechanism which removes the ejected tesserµ. At the lower side of each cylinder is an extruding roll 32, Fig. 2, which operates on all the ejectors, and causes the tesserµ not already rejected to be deposited on an assembling device comprising an endless belt J. The latter comprises rack elements 34, hinged together, which actuate the cylinder D by engaging with the gearing 17. The rack sections are supported in guideways 38, and are driven by any suitable mechanism. The supporting surface of the belt J is constituted by perforated metal plates joining the rack sections. The backing for the linoleum is preferably adhesive paper or felt K, Fig. 1, supplied from a roll 46, and passed over rolls 47 and thence through sets of guide and pressure rolls L, M, to the point where the tesserae are transferred thereto. Transfer of the tesserµ is effected during passage of the backing and tesserµ between rollers 48, 49. The lower roller 49, Fig. 5, is provided with longitudinal ribs 53 forming recesses 54 which communicate through ports with stationary valve members 56 through which compressed air is supplied. The air passing through the perforations in the table J forces the tesserµ against the backing. The ribs 53 are preferably covered with rubber. After passing over the roller 48, Fig. 1, where it is inspected for flaws, the material passes over a second inspection roller 63, and around a heated pressing cylinder 64 where it is pressed by means of pressure rolls N and a resilient pressing band 65. It finally passes around a finishing cylinder 66, where polishing materials are applied. The action of the pattern rolls in generating the design shown in Fig. 8, for example, is as follows. The pattern shown corresponds to three revolutions of the pattern roll. The pattern units along the line T-T indicated by diagonal shading (corresponding to the colour selected by the particular pattern roll considered) are selected by the set of studs indicated in Fig. 10, the numerals on the studs and pattern corresponding. As the roll rotates, the studs operate in the order 1 .. 11, la .. 11a, 1b .. 10b, and then repeat. Where the tesserµ are to be retained, the positions 4, 6, 7, 9, 2a, 4a, 5a, &c., are not occupied by studs. In order that some of the pattern elements may be selectively coloured, rotating stencils 70, Fig. 1, may be provided to deposit on the travelling table colouring materials which are taken up by the surface of the selected tesserµ.