| 摘要 |
1420079 Web feeding MONARCH MARKING SYSTEMS Inc 18 Dec 1972 [6 Jan 1972 (4)] 58239/72 Heading B8R Apparatus for and a method of feeding a web from a supply roll around a continuously rotating drive member and again over the roll to a intermittent web feeder, wherein web tension at the drive member determines the driving force imparted by the drive member to the web. As shown, a web from roll 36 is passed around continuously rotating feed member 98, then fed over roll 36 again and led to intermittent feed roll 42. Member 98 comprises a hub having resilient (e.g. rubber), radial blades 162 which flex as they engage the web, web tension determining the drive force imparted by blades to the web. The blades 162 are driven with a peripheral speed greater than that of the roll 42. As shown in Fig. 1, the web may slacken so as to be out of contact with the member 98. The member 98 prevents inertia of the roll 36 from feeding lengths of web when not required. A circumferentially ridged aligning roll 41 guides the web to a selected edge of the feed path. |
