IMPROVEMENTS IN APPARATUS FOR MAKING PAPER BAGS, WRAPPERS, AND ENVELOPES
Year: 1880

page_text: PROVISIONAL SPECIFICATION left by Richard Woods at the Office of the
Commissioners of Patents on the 13th December 1880.
RICHARD WOODS, of Manchester, in the County of Lancaster, Over-looker.
"IMPROVEMENTS IN APPARATUS FOR MAKING PAPER BAGS, WRAPPERS, AND
ENVELOPES."
My said Invention relates to apparatus for automatically making bags, wrappers,
and envelopes from a continuous web of paper fed into the machine. The mechanism
is supported upon a suitable framing, in front of which is placed the continuous
web or roll of paper to be used. The said paper is led over suitable guides between
two revolving rollers, one of which is furnished at intervals in its length with
knife edges or saw teeth which divide the paper web into strips of any required
breadth. On each side of these knife edges or saw-teeth, and standing at about
an equal height from the roller, are projections or indenting edges, which as the
paper passes beneath or over them indent it a short distance from the cut edge.
Behind these rollers the continuous strips of paper encounter the pasting apparatus,
which consists preferably of a revolving disc or segment of a disc dipping into and
revolving in a paste box, the edge of the disc or segment transferring the paste to
the said paper. Any other suitable means for applying the paste may however be
used. The paste is applied to each strip of paper between the herein before referred
to indented line and the outer edge, and the paper in its further progress is led
past a curved fence, the spirally shaped sides of which turn each edge of each
paper strip inwards on itself presenting the pasted sides outwards. The strips
then pass between another pair of rollers, the periphery of one of which is provided
with a longitudinal range of prickers and also with a longitudinal projecting edge,
so arranged as that the prickers will perforate the strips across at certain intervals
corresponding to the length of bag required, while the projecting edge will similarly
indent the paper at corresponding intervals, the perforations and indentations
succeeding each other. After passing through the rollers the free or leading end
of the strip is arrested by a guide or fence, and the strip is folded over at the cross
indentation and pressed down by another pair of rollers on the pasted edges, so
as to form a bag with a pasted seam at each side and a seamless bottom. A
rapidly revolving pair of rollers then seize the end of the bag so formed and pull
it away from the strip, severing it at the cross perforations, and depositing it in

page_text: any suitable receptacle, from whence it is removed in a finished state, or otherwise
the bags so formed may be fed directly into a printing machine.
In making open wrappers the pasting and folding apparatus may be dispensed
with and means for applying gum substituted, and in the manufacture of envelopes
the prickers may, if desired, be arranged so that the cross perforations will meet at 5
an angle in the centre of the strip to form the usual folding over flap, and a double
cross indenting edge should be used in conjunction therewith.