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This article describes a duplexing attachment for impact printers with an automatic sheet feed capability.
English (United States)
This text was extracted from a PDF file.
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This is the abbreviated version, containing approximately
90% of the total text.
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Non-Inverting Duplexing For Automatic Impact Printers
This article describes a duplexing attachment for impact printers with an
automatic sheet feed capability.
In the figure, connected to impact printer 1 is paper guide 2. Paper feed drive
roller 3 is connected to platen 4 by drive O-ring belt 6. Turn table 7 is driven by
paper feed drive roller 3 through belt 8. Turn table 7 includes a cam 9. Cam
follower 10 is designed to cooperate therewith. Cam follower 10 is connected to
pivot point 11. Idler roller 12 pivots about point 11 into and out of engagement
with drive roller 3 through an appropriate opening in paper guide 2. Turn table
clamp 13 also pivots about pivot point 11 into and out of engagement with turn
In operation, after a sheet 14 is printed on the first side, it is run forward past
platen 4 between paper guides 2 and 15 and is caught between drive roller 3 and
idler roller 12, and then fed to the right in the figure. Concurrently, turn table 7 is
moving, and cam 9 causes cam follower 10 to disengage idler roller 12 and
engage clamp 13 and turn table 7 with the sheet in between through an
appropriate opening in sheet guide 2. Sheet 14 is turned 180 degrees and fed to
the left through idler roller 12 and drive roller 3 back around platen 4, ready for
printing on side 2.
Since this attachment is adapted for selective operation, the user has a
choice of printing on one or two sides of the sheet. Additionally, if an inverted
second side is desire...