Apparatus for boring perforations in a web sheet

Details Apparatus for boring perforations in a web sheet Apparatus for boring perforations in a web sheet

1992-03-03

1993-05-11

Albritton, C. L.

Electric heating

Metal heating

By arc

131281, 21912177, B23K 2600

Patent

active

052103900

ABSTRACT:
A continuously emitted convergent laser beam is deflected by means of a rotating polygon mirror, to be directed to a reflector mirror having a pair of reflective surfaces, which adjoin each other at the vertex portion thereof. As the reflective surfaces of the reflector mirror are scanned with the laser beam, the beam is split and alternately directed to one mirror pair and the other mirror pair. The laser beam directed to each mirror pair is further divided into segment beams, which are reflected in opposite directions and condensed on a tipping paper sheet by means of condensing lenses. Thus, two alternate pairs of rows of perforations, four rows in total, are bored through the sheet.

REFERENCES:
patent: 4916272 (1990-04-01), Okumoto

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