Improvements in Machinery for Making Paper Bags.
Year: 1898

page_text: Date of Application, 1st Oct., 1898-Accepted, 5th Nov., 1898
COMPLETE SPECIFICATION.
Improvements in Machinery for Making Paper Bags.
We, WILLIAM DICKIE and WILLIAM INGLIS, Wholesale Stationers and Printers,
Couper Place, North Wallace Street, Glasgow, do hereby declare the nature of
this invention and in what manner the same is to be performed, to be particu-
larly 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 same.
The machinery is specially adapted for making what are known as
bags.
"satchel"
And in order that the invention may be properly understood we have hereunto
appended two explanatory sheets of drawings which show two methods of carry-
ing the invention into effect or practice."
Fig. 1 is an end elevation, Fig. 2 a side elevation, Fig. 3 a plan and Fig. 4 a
section on the line - Fig. 3, of one form of the apparatus. In Fig. 4 the
parts are shown in the position assumed when folding the paper.
Fig. 5 is an end elevation, Fig. 6 a side elevation and Fig. 7 a plan of another
form of the apparatus. Fig. 8 is an end view showing the position of the parts
of the apparatus when it is folding the paper.
Referring to the drawings whereon the same reference numerals wherever
repeated indicate the same or similar parts.
The apparatus Figs. 1 to 4 consists of a base plate 1, 1", secured to any suit-
able table or board, made with a slot 2 and downwardly projecting guides 3, at
the end 1ª. Secured to this thickened end 1ª, is a metal tongue 5 which is so
arranged, as shown at Figs. 2 and 4, as to lie directly above but at a slight dis-
tance from the part 1 of the base plate. The tongue is provided, on its upper side,
with a thin central longitudinal strip 5". Fitted within the slot 2 and capable of
working therein is a block 6 having a dovetailed guide plate 6" secured to it,
said guide plate working in the dovetail grooves 7 of the guides 3. Screwed
to the top of the block 6 is a bag forming plate 8 provided with the usual hinged
pointed flap 9 at its extremity.
Secured to the block 6, at its underside, is a depending rod 10 to whose lower
end is attached a chain or cord 11 leading to a treadle, or other well known and
suitable actuating mechanism, and coiled round the rod 10 is a spring 12 whose
upper end bears against the lower side of the guide plate 6" and whose lower end
bears against a cross head 13 secured in position adjustably, by means of nuts 14,
on the lower screwed ends of two depending rods 15 fitted securely in the guides 3.
Carried in bearings at each side of the base plate 1 are rock shafts 16 having
rigidly attached to them angled folding plates or wings 17. The front end of
each rock shaft has a chain, wheel 18 fitted eccentrically on it. Chains 19,
attached at one end to the bottom of the plate 6" and at the other end to spiral
springs 20, pass over the chain wheels 18. The spiral springs 20, at their lower
ends, are, as shown, attached to the ends of the cross head 13.
In Figs. 2, 3, and 4, A is the table which is cut out for the reception of the
base plate of the apparatus. A¹ is a slot made in the table at one end of the
apparatus to allow the rods 10, 15, etc., to pass through.

page_text: 22 are screws fastening down the base plate.
The tongue 5 is precisely similar in shape to the bag forming plate 8 but its
pointed end is not hinged as is the end 9.
With this apparatus the sheet of paper to be folded into a bag is, after being
pasted along two adjacent edges one for the side seam and one for the bottom
of the bag, laid on the base plate 1 with its central part under the tongue 5 the
side parts being held up vertically or nearly so by the operator. Thereupon
the treadle is actuated with the result that, at one operation, the side wings 17
fold in the side parts of the sheet on top of the tongue and then almost instan-
taneously the former 8 descends upon the folded sheet and wings. These move-
ments of the mechanism make the bellows sides of the bag. The operator_now
folds the free ends (one of which is pasted at the edge) of the sheet of paper down
on top of the former 8 and causes them to adhere together, and, at the same time,
folds back the flap 9 so as to form the bottom of the bag in the usual manner.
Thereafter the bag is withdrawn from the apparatus and the pressure released
from the treadle whereupon the action of the springs 12, 20, force up the forming
plate 8 into the position shown at Figs. 1 and 2 and open out the wings 17.
It may be stated that when the treadle is depressed the spring 12 is com-
pressed and also the chains 19 are pulled so as to turn the eccentric chain wheels 18
and rock the shafts 16, thereby folding in the wings 17 on top of the tongue 5
in the manner shown at Fig. 4.
The strip 5 prevents the forming plate 8 coming down so close on top of
the tongue 5 as to prevent the proper folding of the paper by the wings.
The dotted lines at, 23, Fig. 3 and the full lines at Fig. 4 indicate the wings
in the folded in position. As will be seen they lie at each side of the strip 5".
The apparatus shown at Figs. 5 to 8 only differs, practically, from that at
Figs. 1 to 4 in so far as the rock shafts 16 are actuated by slightly different
mechanism. In this case each rock shaft has a pinion 25 at its end which is
capable of gearing with a small rack 26 at each side of the plate 6". The rock
shafts have small arms 27 which are capable of bearing against and, when the
block 6 and former 8 move downward, of lifting up the short levers 28, ful-
crumed at 29, against the action of the springs 30. 31 are rest pins against
which the levers 28 rest when the block 6 is in the up position as shown at
Figs. 5 and 6. When the treadle is actuated so as to pull down the former 8
on top of the tongue 5 the racks 26 actuate the pinions 25 so as to turn round
the arms 27 into the position shown at Fig. 8, at the same time folding in the
wings 17 on top of the tongue 5. The arms 27, and also the wings, are retained
in this position during the descent of the block 6 and former 8 by means of the
levers 28 which bear frictionally against the ends of the arms 27 as shown
clearly at Fig. 8. The action of the springs 30 retains the several parts in the
positions shown at Fig. 8 until the treadle is released and the block 6 and former 8
are allowed to rise again under the action of the spring 12, whereupon the reverse
movement of the racks 26, after the block 6 has risen a certain distance, actuates
the pinions so as to withdraw the armus 27 from under the levers 28 whereupon
the latter, under the action of the springs 30, move down and bear upon the
pins 31 as shown at Fig. 5. With this mechanism the same effect is produced as
with the mechanism at Figs. 1 and 2, viz., that the folded in wings are retained
in the folded in position until the former 8 has risen a certain distance above them
when the wings are opened out so as to be ready to fold the next sheet by the
action of the racks.
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:-
1
1. The construction or general arrangement and combination of parts of the
machine for making paper bags, substantially as herein before described and

page_text: shown at Figs. 1 to 4 and under a modified construction at Figs. 5 to 8 of the
drawings annexed.
2. The mechanism for operating the folding wings, substantially as herein-
before described with reference to Figs. 1, 2 and 3 of the drawings annexed.
3. The mechanism for operating the folding wings, substantially as herein-
before described with reference to Figs. 5 to 8 of the drawings annexed.
Dated this 28th day of September 1898.