| 摘要 |
<p>A web adjuster device (135) includes a frame defining a first web engaging surface (157). A web clamping member (154) is movably mounted to the frame and defines second and third web engaging surfaces (162, 159a). A web is received between the first and second web engaging surfaces (157, 162), and in one direction of web travel the web engages the third web (159a) engaging surface to force the second web engaging surface (162) toward the first web engaging surface (157) to trap the web therebetween. In an opposite direction, the web engages the third web (159a) engaging surface to force the second web engaging surface (162) away from the first web engaging surface (157) to allow web travel in this direction. The third web engaging surface (159a) may be omitted in favor of a web engaging protrusion extending from the web engaging surface of the frame, wherein the second web engaging surface facilitates trapping of the web against the web engaging protrusion.</p> |
