Method and device for exposing both sides of a sheet
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United States of America Patent
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May 28, 2002
Grant Date -
N/A
app pub date -
Nov 8, 1999
filing date -
Nov 10, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A device is described for exposing both sides of a light sensitive sheet such as a printed circuit board panel according to imaging data. The device comprises an optical system for scanning the sensitive sheet by one or more beams. The optical system scans both sides with the scan lines on one side mutually positioned with respect to the scan lines on the other side. According to one implementation, the optical system includes two optical scanning units driven by a single source, with a switch alternating the beam from the source to one then the other optical scanning unit.
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