Patent GB-704010-A (GB)
Title: Improvements in and relating to the testing of fibrous materials fed in flat form totextile machines and/or delivered by them in flat form
IPC: D01H5/42
Filed: 1951-05-16
Abstract: 704,010. Testing and measuring textile materials; lap-forming apparatus; arrangements of rollers in textile spinning &c. machines. DEUTSCHER SPINNEREIMASCHINENBAU INGOLSTADT NIEDERLASSUNG DER SCHUBERT & SALZER MASCHINENFABRIK AKT.- GES. May 16, 1951 [Aug. 26, 1950; Jan. 27, 1951], No. 11474/51. classes 120(1), 120(2) and 120(3) Variations in the thickness of fibrous material fed in flat form to textile machines and/or delivered by them in flat form are detected and recorded and/or counted by the use of two condenser plates which lie opposite one another at a certain distance apart (as may be gauged by a wedge-shaped strip according to the predetermined nominal thickness and nature, composition, or texture of the material under test) and between which the fibres pass and of which the capacity is then varied by the variation in the thickness, of the mass of fibres: capacity variations, which represent deviations in thickness of the material from a mean value which exceed any predetermined duration and tolerance, are shown on indicating apparatus which may contain signal lamps and a recording device for indicating each separate occasion on which said mean value is exceeded or not reached and also electric control devices which are actuated as soon as the variations from the mean value last longer than, for instance, 10 per cent of the mean value. Detection apparatus may be fixed at a point on the path traversed by the mass of fibre during treatment or it may form a mobile testing unit which may be interposed independently of individually operative machines in the series of operations. In the fixed detection means shown in Fig. 1, a mass of fibres 1 from a scutching machine 2 is guided between calender rollers 3, 4, 5 and 6, and thence to winding- up drums 7 and 8 on which it is formed into a lap 9: it passes between roller 4, constituting a fixed condenser plate, and a removable and adjustable condenser plate 10 which is connected to indicating apparatus 14, comprising two lamps, illumination of one or other of which shows the sense of the deviation from the mean value. In the operation of the apparatus shown in Fig. 4, the material 1 is drawn from a lap 42 by an unwinding roller 27 and is passed between a fixed condenser plate 4<SP>1</SP> and an adjustably mounted condenser plate 10 and, together with a winding tube carried in a lap guide 44 resting on winding rollers 7 and 8, is wound to form a fresh lap 9: capacity variations are transmitted by means of a screened cable 13 to indicating apparatus and, if required, to recording and/or counting devices: if the material is not to be re-formed into the lap 9, the winding tube is stowed in a slot 46 and the roller 8 is used as a winding roller. Winding and unwinding rollers may be driven at synchronized or different speeds from a common drive, as through a chain or belt drive 28, 29, 30, and a train of spur wheels 31-34, or independently, e.g. electric motors, in which the disposition of stator and rotor are reversed, and built into the rollers so that the rotors form. the shells thereof.