Patent GB-190309916-A (GB)
Title: Improvements in Machinery for the Manufacture of Mosaic Linoleum Floor Cloth and the like.
Inventor: NAIRN MICHAEL BARKER
Filed: 1903-05-01
Granted: 1904-04-28
Abstract: 9916. Nairn, M. B. May 1. Coated fabrics.-Relates to machinery such as is described in Specification No. 21,162, A.D. 1902, for the manufacture of mosaic linoleum, floorcloth, &c., and consists of a series of similar units for cutting out and depositing tesserµ of various colours on a canvas base which passes through the units to a hydraulic press wherein the tesserµ and base are united by the combined effect of pressure and heat. The canvas is moved forwards intermittently in steps each equal to the breadth of a unit. In each unit, the sheet to be cut into tesserµ is fed in from the side of the machine behind a travelling roller, which oils a horizontal overhead series of dies or cutters, and is then forced upwards against the dies by a pressure roller. The carriage supporting the rollers &c. being then withdrawn, the tesserµ are lowered from the dies and deposited on the canvas base, which is then moved forwards for a second series of operations. Fig. 3 shows a transverse section of the machine through the centre of a unit, and Fig. 5 a side view of part of the machine at the rear of a unit. The longitudinal table 4 along which the base cloth travels is supported by a longitudinal framing 8, and the cutting and depositing arrangements by an overhead crosshead 9 and two platens 23, 25. The platen 23 is hung from eccentrics 24 on the crosshead 9, and carries the dies 33, the extrusion plungers 34 of which are bolted to the fixed platen 25 of the crosshead. In addition to the movement of the platen 23 relative to the platen 25 obtained hy the use of the eccentrics, a vertical movement of the crosshead and platens is obtained by the action of cams 20, 21 on shafts 22 upon levers 16, 17. These levers are pivoted to the framing 8, and are connected at their outer ends to rectangular frames consisting of vertical rods 14 and horizontal beams 10, 15 which support the crosshead 9. The carriage which feeds the sheet under the dies consists, firstly, of an outer part 44 which runs with wheels 45 on transverse rails 43 extending across the machine on brackets 41 of the frame 8. This part is formed with a sheet-iron bottom, and is provided with an endless band 63 on rollers 69 to carry the waste material to an external travelling- band 73. An oiling-trough 51, oiling-roller 52, and nipping-bar 49 are also fitted in the rear end of the carriage 44. The inner part or carriage moves within the outer part, and is fitted with the resilient pressing-roller 47 and a number of small rollers 48 for supporting the sheet 50. Racks 54 upon the upper edges of its sides gear with pinions on a shaft 56 which reciprocates the carriages into and out of the machine. Starting from the position shown in Fig. 3, the inner carriage is drawn out, the outer carriage remaining at rest until the inner carriage strikes the stops 57. The pressing-roller 47 is carried by cranked levers acted upon by springs 59 which press the roller upwards against the dies 33 as soon as the projecting ends 58<x> of the levers have been released from under the bar 49 by the outward motion of the inner carriage. During the remainder of the outward motion, the roller 47 forces the stationary sheet 50 against the dies, the cut portions or tesserµ remaining in the dies, and the waste portions being forced down on to the band 63 behind the roller 47 by spring discs 30 between the dies. The carriages finally remain at rest outside of the machine, while the crosshead 9 &c. act to deposit the tesserµ on the base cloth. Stops 32 on the table 4 arrest the motion of the platen 23 before the cams 20, 21 have completed their depressing action, and the crosshead 9 and platen 25 continue to descend, thus expelling the tesserµ from the dies by means of the plungers 34. At the same time cams 38 on the shafts 22 act through parallel motions 37 on vertical rods, stops upon which then bear against loose sleeves to turn the eccentrics to their upper dead centres and thus to raise the platen 23 and dies 33. The cams 20, 21 then raise the crosshead 9 and the two platens, so that the dies are brought to their highest position, but with the plungers slightly protruding ready for oiling. When the inner carriage moves inwards again, the roller 47 is depressed by the action of the bar 49 on the projecting arms 58*, and a fresh sheet 50* of material is nipped between the roller and bar 49 ready to be carried under the dies. At the same time, inclines on the rear end of the inner carriage pass under studs on the arms 60 which support the oiling-roller 52, so that the roller 52 is raised against the dies and plungers. When the inward travel of the carriages is finished, the cams 20, 21 complete the upward motion of the crosshead 9 and platen 25, the platen 23 remaining stationary against stops 28, so that the plungers 34 are drawn back into the dies. The cams 38 also at this stage move the eccentrics 24 back to their original positions. The oiling-roller 52 is allowed to drop into the trough 51, when the inner carriage again moves outwards. Pinions on the shafts of the rollers 52, 47, and 69 are in gear through other pinions with racks on the rails 43, so that the rollers are driven positively as the carriages move under the platens.