| 摘要 |
1,244,347. Testing fibres. E. SCHWARZ. 13 Nov., 1968 [17 Nov., 1967], No. 53914/68. Heading D1F. In apparatus for automatically and continuously testing a succession of fibre samples and determining the fibre length distribution in the fibre stock sampled, continuous relative movement occurs between a comb and a cooperating drum and in each cycle of such movement, in sequence, the comb removes fibres from tufts protruding through the drum shell, these fibres are secured to the comb to form a trading "beard", the fibres of the beard are parallelised by cards, the beard is optically scanned and light passing therethrough is converted into electrical signals which are evaluated and computed (so as, finally, to provide the required data) and the fibres are removed from the comb in preparation for the next cycle. As shown, a comb 17, carried around a drum 10 on a manually or power operated arm 13 swinging about axis 14, in an angular section 21 of its travel removes fibres from tufts 30 (of a bundle 11 within the drum) protruding through perforations 29; in section 22 an eccentrically mounted roller 18 is turned to clamp the fibres caught between the comb teeth; in section 23 the fibres are parallelised by cards 31 which also remove short fibres, neps and foreign matter; in section 24 the homogenuity of the beard may be improved, e.g. by reorientation of fibres as roller 18 is temporarily loosened; in section 25 additional cards 32 act on the beard; in section 26 the beard may be smoothed and further cleaned by a counter-revolving brush 33 and/or a vacuum suction device (not shown); in section 27 the fibres are scanned as by light from an elongated source 36 in an enclosure 37 passing through fibres (trailing over a transparent plate 38) and a slit 39 to impinge on a light sensitive element 40; finally in section 28 the clamping roller is released and the loosened fibres are pneumatically removed by blowing (or sucking) action of air flowing through a tube 34 and emerging radially through holes 35. According to modifications (not shown) the drum rotates and the comb and associated members are stationary, the drum may be oval or rectangular with semi-circular ends in crosssection, the comb may be guided by a rail equipped with control devices for actuating the several operations on the fibre (in sections 21-28), and the light source (36) may be stationary and/or external or the element 40 and the source 36 may be interchanged. |
