A NEW OR IMPROVED MODE OF AND APPARATUS FOR PERFORATING PAPER
Year: 1881

page_text: PROVISIONAL SPECIFICATION left by Gerard Wenzeslaus von Nawrocki
at the Office of the Commissioners of Patents on the 19th March 1881.
(A communication from Moses Heimann, of Berlin, in the German Empire,
Engraver.)
GERARD WENZESLAUS VON NAWROCKI, of the Firm of J. Brandt and G. W. von
Nawrocki, of 124, Leipzigerstrasse, Berlin, in the German Empire, Patent Agent.
"A NEW OR IMPROVED MODE OF AND APPARATUS FOR PERFORATING PAPER."
(A communication from Moses Heimann of Berlin, in the German Empire,
Engraver.)
Heretofore perforated -paper, especially for paper lace and borders for nosegay
holders, for wedding and other cakes, and for other kindred purposes, has been
made by placing paper on steel plates having the required pattern engraved thereon,
and by striking the paper with a lead hammer. Now according to this Invention
such perforated paper is produced by roller pressure, all as hereinafter described.
The paper to be perforated is guided in between a steel roller having the
required pattern sharply engraved thereon, and another roller having a plain
surface and made of a softer material, by preference of a metal composition. The
rollers are pressed together with any required pressure so that the cutting edges
of the engraved roller shall penetrate the paper, and to a certain slight degree enter
into the other or softer roller. This latter would thereby in a short time or even
few revolutions become useless if there were not appliances for immediately
removing the impressions made therein by the cutting roller. This may be done
in various ways, but preferably by a smoothing roller which is pressed against the
soft roller. This action may be aided by a knife which scrapes against the soft
roller, and thus also removes the paper cuttings and dirt. Or instead of the
smoothing roller a scraper appliance may be used.
The aforesaid three rollers may be placed one above the other, the engraved or
cutting roller above, the soft roller between, and the smoothing roller beneath.
The top roller and the bottom roller have adjustable bearings, and are geared by a
tooth wheel on each and by an intermediate tooth wheel, the gudgeons of which
have adjustable or movable bearings. The apparatus is worked by hand or
power.

page_text: The soft roller may have its surface turned, as is occasionally required, without
the insertion of other tooth wheel gearing, and by simply shifting the intermediate
wheel. The soft roller is so arranged that it may be removed without first
removing the top and bottom rollers, for this purpose its gudgeons have each their
half bearing in a lateral filling piece fitting in the framework of the machine and
held by a screw; on removing these filling pieces the roller can be moved laterally
and pulled out endways through the spaces vacated by the filling pieces.
The aforesaid knife is placed in a frame mounted on a screw, on turning which
the knife can be moved along the roller; the frame rests on a cross bar. The
knife is adjustable so as to be approached to the roller as desired.
The paper strip passes over a table with clip guides which smooth the paper; the
table is continued on the other or back end of the machine, where there are a pair of
felt covered draw rollers with adjustable bearings.
A suitable composition metal for the soft roller is made of four parts tin with
one of antimony.
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