| 摘要 |
<p>1521587 Bursting apparatus INTERNATIONAL BUSINESS MACHINES CORP 8 Sept 1976 [31 Oct 1975] 37273/76 Heading B8R [Also in Division B4] A burster for weakened webs comprises two feed devices 22, 24 one of which is angularly offset from the path of the web 10, and a curved guide member 30 which defines the path between the devices 22, 24. Device 24 is operated in response to a signalling device by magnet 42 at a faster speed than device 22 to break the web. A blower 27 assists the web in following the guide 30. Each feed device comprises a constantly running roller and a pressure roll which are brought together when commanded by a timing circuit control in conjunction with a position sensor 48.</p> |
