jogil,I have a question regarding that stickney bar and wheel perforator pic posted by -IBFS.
In a previous post you said
Quote:
Sheet-fed flat plate printed sheet and booklet stamps were mostly perforated by two
one-way sheet-fed flat plate rotary wheel perforators with one perforator for horizontal perforations
and with one perforator for vertical perforations. Flat plate coil stamps were perforated by this same
perforator but only in one direction either horizontally or vertically.
On that pic above I see only the rotary wheel where
the pins would only perforate
vertically.
So, were the sheets then repositioned and fed through again
to produce the horizontal perfs?
I had the impression that it was all done on one pass.
My knowledge about perforations is limited but it
seems to be your specialty.