Browse Prior Art Database

Matrix Duplex Printer

IP.com Disclosure Number: IPCOM000113789D
Original Publication Date: 1994-Oct-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 60K

Publishing Venue

IBM

Related People

Helinski, EF: AUTHOR [+2]

Abstract

The Figure describes a side view of an embodiment for performing duplex printing where a dot band print band (1) is used to print both sides of a paper (2). Print hammers (not shown) produce conventional printing by acting on the print elements (9) moving them into contact with a shiftable nylon fabric ribbon (6) which has an inked zone and a non inked zone. The inked zone of ribbon (6) acts on paper (2) which is supported by a spring plate (7) which may be .008 inch thick spring steel which acts as both a ribbon shield for bedsheet ribbon (8) and as platen to support paper (2) when shifted upward as shown. Spring plate (7) may be shifted upward or downward as indicated by arrows (10).

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Matrix Duplex Printer

      The Figure describes a side view of an embodiment for
performing duplex printing where a dot band print band (1) is used to
print both sides of a paper (2).  Print hammers (not shown) produce
conventional printing by acting on the print elements (9) moving them
into contact with a shiftable nylon fabric ribbon (6) which has an
inked zone and a non inked zone.  The inked zone of ribbon (6) acts
on paper (2) which is supported by a spring plate (7) which may be
.008 inch thick spring steel which acts as both a ribbon shield for
bedsheet ribbon (8) and as platen to support paper (2) when shifted
upward as shown.  Spring plate (7) may be shifted upward or downward
as indicated by arrows (10).

      The described configuration would be used to print on the first
side of the print form (paper) as is the usual case in printer
operation.

      The paper would then be reversed to the top of form to begin
printing the second side of the form.

      During the paper reversal ribbon (6) would be shifted downward
to align the non inked zone in front of print elements (9).  Likewise
spring plate (7) would be shifted downward about 1.0mm below the
level of print elements (9).

      In this case spring plate (7) would act only as a ribbon
shield.  Dot row print information would be supplied in reverse order
to fire the hammers which act on print elements (9).

      Print elements (9) would strike the non inked ribbon zone and
mo...