| 摘要 |
PCT No. PCT/GB80/00202 Sec. 371 Date Jul. 22, 1981 Sec. 102(e) Date Jul. 22, 1981 PCT Filed Nov. 24, 1980 PCT Pub. No. WO81/01426 PCT Pub. Date May 28, 1981.A method for the longitudinal compressive treatment of a flexible web, e.g. of paper or textile material, in which the web is continuously driven longitudinally into and through a retarding treatment zone defined by and between a pair of opposed surfaces at least one of which is stationary and rough and retardingly engages the web, the value of the retarding force applied to the web over at least a part of the length of the retarding treatment zone varying in oscillatory fashion across the width of the zone so that the treatment improves or provides a directional property (e.g. stretch) of the web in both the longitudinal and transverse directions. In machines for obtaining this effect, the degree of roughness of retarder surface to which the web is subjected in the zone suitably so varies across the zone. |
