A New or Improved Drilling and Threading Machine for Piles of Paper Bags and the like.
Year: 1898

page_text: Date of Application, 22nd June, 1898-Accepted, 13th Aug., 1898
COMPLETE SPECIFICATION.
A New or Improved Drilling and Threading Machine for Piles of
Paper Bags and the like.
I, GEORG AUGUST WILHELM EHRHARDT, of No. 8, Schleusberg, Neumunster i/
Holstein, Machinery Manufacturer, 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:-
Paper sheets, paper bags, sacks and the like are threaded and hung up in a
convenient place for the purpose of having them at hand and of enabling them
being readily taken for use. This threading is effected almost wholly by hand
and is therefore an extremely tedious operation, and in the case of strong paper
it is also very tiring. Recently it has been tried to effect these operations by means
of machines but without success because on the one hand the needle when forced
through the paper is readily bent and then goes astray or crooked, or breaks off
completely, whilst on the other hand, the holes are extremely liable to get torn
by the forcing through of the needle.
Now this invention relates to a machine for affecting the above objects whilst
obviating all the above drawbacks in every respect. This machine is illustrated
in the accompanying drawings in Figure 1 in side elevation with the frame partly
omitted, and in Figure 2 in front elevation. Figures 3-10 illustrate details of
the machine on a larger scale.
Figures 3-4 illustrate the needle driver in side elevation and in plan.
Figures 5 and 6 illustrate the needle holder with its guide, in two elevations taken
at right angles to each other. Figures 7 and 8 illustrate the apparatus for cutting
the threads after they are drawn through. Figure 9 illustrates the connection of
the drilling spindle with its operating lever, in vertical section.
Figure 10 is a section on the line A-B of Figure 9.
The machine consists essentially of the device for boring a hole for the thread
to be drawn through, of the device for drawing the thread through, and of the
device for cutting the thread. The first device consists of a sleeve b which is
pivotally mounted in the frame a and which serves to receive the drill spindle d
that is fixed to the lever c, with the drill f fixed therein. The spindle d is enabled
by reason of being coupled with the sleeve by means of the pin g and slot h of being
rotated by the cord pulley i by means of a cord passing over the pulley k and guide
pulleys; the spindle is also capable of being raised and lowered by the operation
of the lever c. For this purpose the drill spindle is turned down or stepped at its
upper end and a ring q¹ provided with a pin p' is slipped over it. This ring is
prevented from falling down by means of a plate r¹ and screws s¹. The pins of this
ring engage, as shown in Figure 10, in the slots of the fork of the lever c from
which a rod m leads to a (one-armed) lever n which is fixed below the frame-table-
plate and which is connected by means of a rod o with the treadle lever p. The
lever n serves as needle driver and is constructed for this reason at its front free
end with a fork g in which, as shown in Figures and 4, there are provided slot
holes through which pass the pinss of a tongue piece which engages at its rear

page_text: end with a nose under the shoulder u of the fork and which is constantly pulled
into the fork by means of a spiral spring v. The pins s of the tongue piece t pro-
ject from the slots of the fork and engage, as shewn in Figure 1, in slots in a
guide piece w. Furthermore, guide rods shewn in Figures 5 and 6 are fixed
below the table plate and upon these guide rods there is movably mounted a
block a that holds the needle . This block is either made purposely so heavy
so that, notwithstanding any frictional resistances which may be met by the
needle and the inserted thread in the pile of paper, the said block will draw down
the needle with certainty, or the said block may be weighted with a separate
weight or may be pressed down by means of spiral springs arranged on the guide
rods over said block. The guide and the guide rods are situated, not parallel
to each other, but converging, whereby the tongue t of the lever n is enabled to
take under the needle block when the lever is drawn down, whilst it is enabled
to release the same when the lever is in a horizontal position. Approximately on
the same level as the lever n there is arranged a gripper lever whose nose is
constantly pressed into the path of the needle block by means of a spring c¹.
Directly under the table plate at the end of a slot, Figure 8, which extends from
the working hole in the table plate to the front edge of the table, there is fastened
an angle piece which is formed with a notch or recess f¹ the edges of which are
sharpened after the manner of scissors. In front of these edges there works a
knife which is caused to oscillate by the machine by means of the crank rod ³,
crank, shaft k, and the cord pulleys and m¹.
The mode of operation of the machine is as follows:-
When a thread has been drawn through the eye situate in the upper end of the
needle, the pile of paper to be threaded is pushed under the raised presser foot n¹.
It is then let go, whereupon it is caused by its tension spring to press down the
pile. Then by throwing the machine into gear the drill spindle is caused to rotate
and the treadle lever is moved down, whereby the drill spindle with its drill
is also moved down. In this manner the drill drills a hole through the pile of
paper. But at the same time the needle driver n has also been moved down,
and its tongue piece in moving upward has passed the needle block a', and bas
moved under the same. If now the treadle lever be released, the spring o¹ will
draw it up again whilst at the same time the lever c and the lever n rise, whereby
the drill and the needle block are also raised. The drill moves out of the pile of
paper, whilst the needle block pushes the needle contained in it together with its
thread through the drill hole, so that the needle projects about 30 millimetres out
of the pile. At the end of the stroke of n, the tongue t leaves the block through
the mutually inclined positions of and, and the block descends together with
the needle until it comes within the reach of the nose of the lever bl. In this
manner there has been formed at the projecting part of the needle a loop of string
or thread which is seized by the attendant of the machine and is held fast by him.
Then on drawing back the gripping lever, the block falls into its original position
and thus draws the needle with it, whilst the eye of the needle slides along the
thread which is being held fast. The pile of paper is now, together with the thread
that is held fast. drawn out from under the raised presser foot, whilst the thread
slides along in the above mentioned slot in the table plate and is cut when it
arrives at the knife g¹. The pile is now ready to be tied up and the threading of
the second pile can now begin.
my said
Having now particularly described and ascertained the nature of
invention and in what manner the same is to be performed, I declare that what
I claim is-
(1) A machine for drilling and threading piles of paper bags and the like,
characterised by a rotating drill i which is moved down by means of a treadle
lever for the purpose of piercing the pile of paper placed in position, and by a
needle for drawing the thread through said pile, said needle being moved through

page_text: the hole when pierced, by means of suitable intermediate mechanisms o, m, t, a',
on the ascent of the drill, and said thread being cut to a suitable length by means
of a cutting device.
(2) A machine for drilling and threading piles of paper bags and the like,
constructed, arranged and adapted to operate substantially as herein before
described and shown.
Dated this 22nd day of June 1898.
ROBERT E. PHILLIPS, Assoc. M. Inst. C.E., M.I. Mech. E.,
Consulting Engineer and Patent Agent,
70, Chancery Lane, London, W.C.,
Associate Agent.