Patent GB-190925275-A (GB)
Title: Improvements in Apparatus for Forming a Lap or Fleece of Fibres.
Inventor: SCRIBNER CHARLES EDWIN THOMPSO
IPC: D01G25/00
Filed: 1909-11-02
Granted: 1910-10-13
Abstract: 25,275. Scribner, C. E. T. Nov. 2. Lap-forming apparatus. - The lap is formed by means of two approximately horizontal endless aprons 19, 20 termed respectively the " compensating-apron " and the " distributing- " apron," which are traversed differentially over a receiving-device 21. The fleece is delivered from a machine such as a Garnettmachine by a delivery device, preferably consisting of an endless apron 4, which is mounted on rollers 7, 8 and.is driven at the same surface speed as the doffer cylinder by a pulley 9. The roller 7 is carried by a journal 12, which is mounted in slides 13, and is provided with an adjusting-screw 16 and a clamping-screw 14. The apron 19 runs on rollers 22 mounted in a carriage 23, which is provided with wheels 24 running on rails 25. The apron 20 runs on rollers 26 mounted in a carriage 27, which is supported at one end by wheels 28 running on rails 29 and is supported at the other end and at each side by a pair of arms 30 carrying a rotatable bush 30<a>, which is apertured to fit a square shaft 31 journaled in bearings 32. The carriages 23, 27 are traversed differentially by mechanism of the following character. The carriage 27 is provided with brackets 38 slotted to receive a cross-bar 36, which is secured at the ends to endless chains 39 running over sprockets 40, which are driven by chains and spur-gearing from the doffer-cylinder. The carriage 23 is provided at each side with an endless chain 50 running on sprockets 51, which are loosely journaled on the axles of the rollers 22. Each chain 50 is fixed at one point by an arm 52, which is secured to the framework; and each chain is also secured to an arm 49, which is secured to the carriage 27. When the carriage 27 moves in either direction, the arm 49 drags the carriage 23 in the same direction through one-half the distance and at one-half the speed. The mechanism for driving the aprons 19, 20 is of the following character. The pulley 9 is connected by a chain 54 to a sprocket which drives a cross-shaft connected by bevel-gear to the side-shafts 31. The sleeves 30<a> each carry a bevel 59 gearing with bevels 60 on a cross-shaft 261, which is secured to one of the rollers 26. Chains 62, one on each side of the carriage 27, pass round sprockets 61, 63, the sprockets 61 being secured to the shaft 261. The chains also pass round sprockets 64, 65, which are journaled in the carriage 23, the sprocket 64 being connected by spur-gearing 66, 67 to one of the rollers 22 carrying the apron 19. During the traverse of the aprons, the sleeves 30<a> slide on the shafts 31, and thus maintain the driving connexions with the shaft 261, which drives the apron 19 directly, and drives the apron 20 by means of the chains 62. The travel of the apron 19 relative to the carriage 23 is the resultant of the travel due to the normal drive by the chain 62 and travel imparted by the relative movements of the carriages 23, 27. During the traverse of a carriage to the left away from the Garnett-machine, the extra travel of the carriage 27 increases the travel of the apron 19; and in the traverse to the right towards the Garnett-machine, the extra travel of the carriage 27 decreases the travel of the apron 19, so that the speed of the apron is greater in the traverse to the left than in that to the right. The fleece is supported on the top surfaces of the aprons 19, 20, and is delivered to the receiver 21 by guide and pressure rollers 33, which are mounted in slotted brackets 35 on the carriage 27 and are driven by chain-gearing from the shaft 261. The receiver 21 may consist of an apron which is traversed at right-angles to the carriages. During the traverse of the carriages to the left, the increased speed of the apron 19 prevents the fleece from piling-up, and also acts to deliver the fleece more rapidly to the apron 20 which is acting in this traverse to draw forward the fleece more rapidly. During the traverse of the carriages to the right; the decreased speed of the apron 19 prevents the fleece from being driven forward too rapidly, and also prevents the fleece from piling-up on the apron 20.