Patent GB-385786-A (GB)
Title: Improvements in or relating to machines for the wet treatment of fabrics
IPC: D06B1/14
Filed: 1932-02-25
Abstract: 385,786. Treating fabrics with liquids. MASCHINENFABRIK BENNINGER AKT.-GES., Uzwil, Switzerland. Feb 25, 1932, No. 5687. Convention date, Oct. 8, 1931. [Class 140.] In apparatus for treating fabrics with liquids of the type comprising four rolls which in conjunction with lateral sealing means form a closed space through which the fabric is passed, means are provided for increasing and relieving the pressure between the rolls in such a manner that a uniform pressure is simultaneously exerted at all four places of contact of the rolls and along the whole length thereof, the pressure between each pair of rolls being automatically equalized. The pressure adjusting or relieving operation is effected from a single operating position. In the construction shown in Fig. 1, the rolls 2 .. 5 form, with end sealing plates 8, a space 6 for the liquid. The roll 2 is mounted directly in the frame, the roll 4 is mounted in bearings on a pair of levers 16, while the rolls 3, 5 are mounted in bearings on pairs of levers 31, 32 respectively. The upper ends of the levers 16 are pulled by means of springs 17 against adjustable stops 18, while the lower ends are pivoted on sleeves 20 eccentrically secured to a shaft 19 and sliding in slots in the frame. The shaft 19 is journalled in bearings in arms 22 pivoted to the frame so that the shaft 19 is moved bodily in an arc when it is rotated through 180‹ by an operating handle. The tension of the springs 17 is adjustable by means of a handle 25. The levers 31, 32 in which the rolls 3, 5 are mounted are connected at one end by tierods 33 and at the other end by links 34, 35 and double armed forked toggle-levers 37. The pivot pins 38 at the upper ends of the levers 31, 32 carry rollers which roll on cam surfaces 15 on the levers 16. The togglelevers 37 are mounted on a shaft which may be rotated through clutch mechanism by a hand-lever 40 to separate or draw together the upper ends of the levers 31, 32. The pivot pin 45 at the lower end of the lever 31 is mounted with play but adjustably in a slot 46 in a pivoted arm 47. The system of levers causes the pressure between each pair of rollers to be equalized. In a second form of construction, shown diagrammatically in Fig. 11, the roll 4 is mounted on a pair of levers 16, spring tensioned and pivoted in eccentric sleeves as before, while the rolls 3, 5 are mounted on arms 58 which are pivoted to a frame 56 but which may be locked in the position shown relative to the latter by pins 59. The arms 58 may be rotated by gearing 60, 62 to separate fully the rolls, but in the closed position the rolls 3, 5 rest on the roll 2 which is mounted directly on the frame of the machine, and the frame 58 floats freely. The axle of the roll 4 has limited vertical play in a slot 55 of the frame 56, so that on upward movement of the lever 16 to separate slightly the rolls, the frame 58 and rolls 3, 5 are lifted. In a third form, shown diagrammatically in Fig. 13, the rolls 2, 4 are mounted directly in the frame, while the rolls 3, 5 are mounted in member 65, 67. The members 65 are slidably mounted on spindles 68, 69, and the members 67 are threaded to engage threaded portions of the spindles, which are housed in bearings in a block 70, and can be rotated by gearing from a hand-lever 75. Adjustable springs 73 hold the roll 3 against the rolls 2, 4, stops 74 being provided to limit the movement when the rolls are separated. Guide faces 79, 80, comprising terminal stop portions 81, 82, are provided to support the members 65, 67 when the rolls are separated by rotating the spindles 68, 69 and so causing the member 67 to move outwardly. On rotating the spindles so as to draw the rolls 3, 5 together, the members 65, 67 rise from the guide surfaces 79, 80, and the rolls are supported on the roll 2. In any of the forms described, means may be provided to counterbalance the weight of the movable rolls so that the pressure between the various rolls is exactly equalized. The lateral sealing means for the ends of the rolls comprise plates 8, Fig. 17, pressed against the end of the rolls by a spring 10 which acts through a three-armed lever 9. The tension of the spring is adjusted by a screwed spindle 12, and liquid is introduced into the space between the rolls by means of a pipe 13 secured to the plate 8.