Improvements in Machinery for Making Paper Bags.
Year: 1899

page_text: Date of Application, 17th Feb., 1899-Accepted, 18th Mar., 1899
COMPLETE SPECIFICATION.
Improvements in Machinery for Making Paper Bags.
We, WILLIAM DICKIE and WILLIAM INGLIS, of Couper Place, North Wallace
Street, Glasgow, Wholesale Stationers and Printers, do hereby declare the nature
of this invention and in what manner the same is to be performed, to be particularly
described and ascertained in and by the following statement: ---
This invention relates to machinery for making paper bags and it has for its
object to improve and simplify the construction of such machinery.
Under this invention the bag is formed by hand upon a bag-former of simple
construction and of tubular shape and rectangular section which is capable of being
collapsed so as to shape the bag into the usual flattened condition in which bags
are generally supplied upon the market.
And in order that our said invention may be properly understood we have
hereunto appended an explanatory sheet of drawings, wheregn,
Fig. 1 is a front elevation and Fig. 2 a plan of the machine.
Fig. 3 is a plan view showing the bag former collapsed.
Fig. 4 is a horizontal section taken on the line - Fig. 1.
Fig. 5 shows a bag made on the machine.
Referring to the drawings whereon the same reference numerals wherever repeated
indicate the same parts.
The machine consists of a base plate 1 which is screwed to the table 2 and five
plates 3, 4, 5, 6, 7, which are hinged to one another and to the base plate in such
manner as to form a rectangular tube which normally stands up vertically on the
base plate. This rectangular tube constitutes the bag former.
The front plate 3 is hinged at its lower end, at 8, to the base plate, and, at its
upper end, at 9, to the plate 7, whilst it is also hinged at the sides, at 10 and 11,
to the side plates 5, 6. The back plate 4 is hinged at its lower end (at 12 Fig. 2)
to the base plate, and at its upper end, at 13, to the plate 7, whilst it is also hinged
at the sides at 14, 15, to the side plates 5, 6. The side plates are not made in one piece
but consist of two narrow pieces hinged together at 16, 17. These side plates are
not hinged to the base plate nor are their pieces of equal length, the front pieces a
being shorter than the bag former and of rectangular shape whilst the back
pieces are carried up the full height of the bag former and are tapered or cut
away at their upper ends as shown at b¹ Fig. 3.
Spiral springs 18, 19, are attached to rings 20 at the central hinges of the side
plates and to pins 21 on the base plate.
22 is a stop of triangular section secured to the front plate 3 and which serves
as a gauge for the paper when being laid round the bag former.
23 is a vertical stop for checking the bag former when it is raised into the vertical
position.
With this machine the paper, after being pasted at one side edge, is laid round
the rectangular bag former as it stands up in the vertical position and the bottom of
the bag is formed by folding over the paper on top of the plate 7. When this has
been done and the flaps of the bottom pasted down the bag former is collapsed by

page_text: simply bending it over from the vertical position (Fig. 1) to the horizontal position
(Fig. 3) with the result that the bag is flattened out and the bottom is flattened
down on top of the body of the bag into the shape shown at Fig 5.
The parts b' of the back pieces 6 are thickened so that, when the bag former is
collapsed, said parts b¹ will be on the same level as the pieces a (see Fig. 3).
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we consider novel and desire to claim is :-
A machine for making paper bags having a collapsible bag former made
substantially as hereinbefore set forth and hinged to the base plate so that it can be
moved from the vertical to the horizontal position and vice versa...
Dated this 14th day of February 1899
H. D. FITZPATRICK,
100, Wellington Street, Glasgow, Agent.