Patent GB-326763-A (GB)
Title: Improvements in or relating to the manufacture of linoleum
IPC: D06N7/00
Filed: 1928-12-12
Abstract: 326,763. Linoleum Manufacturing Co., Ltd., and Godfrey, A. A. Dec. 12, 1928. Inlaid linoleum. - A method of making inlaid linoleum consists in automatically selecting in turn one of a number of strips of linoleum material and feeding it to a cutting mechanism which cuts off lengths to form tessarae which are pushed on to a backing upon which they are afterwards consolidated. Selected tesserae may be subjected to a turning movement in the plane of their faces before being pushed on to the backing. In the manufacture, for instance, of black and white ti!e pattern linoleum, a plurality of strips of black and of white linoleum are provided. Means are provided to feed the strips, selected bv a Jacquard or other mechanism, step by step. At each forward movement, portions of the strips fed forward are cut off by a guillotine, these pieces being pushed forward on to a travelling backing by the following tessarae. The apparatus described consists of a frame 1, Fig. 1, supporting spindles 2, 3, on each of which is mounted a number of reels 4, 5 of linoleum material, of two different colours of material. The ends of the strips are led downwardly through guide blocks 6, 7, between a series of discs 8, 9 and endless bands 10, 11, one disc and band being provided for each strip. The strips then pass through guideways formed between guides 16, 17. The discs 8, 9 of each series are mounted on rollers 18, Fig. 5, carried on a frame 20 rotatably mounted in the frame 1 and oscillated as here after described. The frame 20 carries electro magnets 21, one corresponding to each disc, cooperating with armatures 22. Each armature is formed with an extension 25 having a beak 26 adapted normally to engage a shoulder formed on a spring-pressed pin 27 adapted to enter holes in the corresponding disc. Located at one side of each series of discs are frames 30, 31, Fig. 1, in which are mounted locking pins 32, Fig. 5, and spring retracted re-setting pins 33. Both pins are adapted to be engaged by plates 34 secured to posts 35 which are engaged by arms 36, Fig. 1, secured to a shaft 37. The electromagnets 21 are connected in circuit with a contact making device which consists of a metallic drum 38, Fig. 1, and a series of wipers. A Jacquard card with perforations corresponding to the pattern to be produced is placed over the drum, which is rotated step by step by a ratchet wheel 42, Fig. 2, and a pawl operated by a link 44 connected to a cam on the main driving shaft 46. The circuit is broken by a switch 41, Fig. 1, operated by a cam 41' on the shaft 46. In operation, the armatures of those magnets 21, Fig. 5, which are energized by completion of the circuit through a hole in the Jacquard are attracted and the corresponding pins 27 released and caused by the associated springs to enter one of the holes in the corresponding disc 8, at the same time push ing the locking pin 32 out of the hole. The anticlockwise movement of the frame 20 is transmitted to the discs locked thereto, and the strips of linoleum in contact with these discs are advanced. The frame 20 remains still at the end of its movement while the strips are cut. The frame 20 is then moved clockwise to its original position in two steps with a period of rest between them. During the first step the pin 27 remains in engagement with and transmits motion to the disc. At the end of the first step the driving pin 27 is opposite the re-setting pin 33, which is now pushed forward, with the pin 32, by the plate 34. The pin 27 is pushed out of the hole by the pin 33, and is caught and retained by the beak on the armature 26. The frame 20 now completes the second step, at the end of which the parts are in the position shown in Fig. 5. The cutting mechanism consists of a table 47, Fig. 7, located in front of the guides 16, 17, and a blade 48 working against a fibre block 48<1>. The blade is actuated by toggle levers 49, 50, Fig. 1, connected to a rod 53 operated by a cam on the shaft 46. Every other tessera in one transverse row, and tesserae in the next row which alternate with those turned in the first row, are turned through 90 by mechanism which comprises a presser bar 54 Fig. 7, carried by levers 55 secured to a shaft 56, Fig. 2, actuated by a lever 57 pivoted to a rod 58. The presser bar 54 is provided with a series of spring pressed plungers 59, Fig. 7, equal in number to the tesserae in one row. Co-operating with these plungers are lifting and rotating plungers arranged in two groups, the plungers 60 in one group alternating with the plungers 61 in the other group. The plungers are provided with rubber rollers 62 in engagement with bars 63, 64 slidably mounted in lifting frames 65, 66 connected to levers 67, 68 on shafts 69, 70. The bars 63, 64 are provided with pins extending into slots in a member 79 secured to a rod 80, Fig. 9. In operation, the presser bar 54 is lowered so that the plungers engage the cut tesserae. One or other of the lifting frames 65, 66 is raised, and the tesserae gripped between the plungers 60 or 61 of the group raised and the corresponding plungers 59. At the end of the raising operation the tesserae are turned by sliding movement of the bar 63 or 64. The various movements of the parts are derived from the main driving shaft 46 as follows. The frames 20 are oscillated by a cam 86, Fig. 2, engaging a roller carried by a rod 87, Fig. 1, pivoted to a lever 88 secured to one of the frames 20 and connected by a link to the other. The shaft 46 carries a chain wheel 90 from which a chain drives a wheel 92 of twice the diameter. Cams 93, 94 on the latter wheel raise the frames 65, 66 through rods 98. The shafts 37 actuating the plates 34 are connected by a link 101 and are actuated by a cam on th main shaft through a rod 103. The machine described is suitable for making tile pattern linoleum from strips of material having a longitudinal edging representing the joint, the turning of certain tesserae enabling the edging to represent the transverse joint. In a modification, the plungers 60, 61 are replaced by spring-loaded plungers 104, Fig. 11, whose movements are controlled by electromagnets 105 energized by a circuit controlled by a Jacquard mechanism. The magnets are carried in a lifting frame 106, and co-operate with armatures 107 which control spring loaded latches 108 adaped to retain spring loaded slides 109 in a position such that blocks 110 on the slides are out of the path of the plungers 104 to which they correspond. When the magnet is energized the latch is released and the block 110 slides below the plunger. The plunger is squared to pass through an arm 111 actuated to rotate the plunger and so turn the tesserae. The various blocks 110 may be of different thicknesses to lift adjacent tesserae to different heights and so permit adjacent tesserae to be turned. The tesserae pass from the machine on to a canvas backing upon which they are consolidated by pressure.