Air density adaptive vacuum controller

Details Air density adaptive vacuum controller Air density adaptive vacuum controller

B - Operations, Transporting

65

H

270/169

B65H 3/12 (2006.01) H04N 1/08 (2006.01)

Patent

CA 1250605

Abstract of the Invention A vacuum media capturing and retention system for a drum type printer or recorder is disclosed. The apparatus includes a vacuum drum with two regions of vacuum passages, one for capturing the leading edge of the media and the second for retaining the trailing edge of the media. When the leading edge of the media is initially captured the vacuum level in the drum is at one level. After the leading edge of the media is captured the vacuum level is dropped to a lower level until the trailing edge of the media is captured. Following the capture of the media trailing edge, the vacuum level within the drum is again increased to retain the media thereto during the copying or re- cording operation of the overall device.

485539

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