Improvements in Automatic Stopping Attachments for Paper Embossing Machines.
Year: 1898

page_text: Date of Application, 25th Feb., 1898-Accepted, 30th Apr., 1898
COMPLETE SPECIFICATION.
Improvements in Automatic Stopping Attachments for Paper
Embossing Machines.
I, JOHANN ALEXANDER PRINCE, of 345, Third Avenue, in the Borough of
Manhattan, in the City of New York, and State of New York, United States of
America, 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 :-
My invention relates to an improvement in automatic stop attachments for paper
embossing machines, in which the machine is automatically stopped by an increased
thickness in the paper being fed thereto. The object for providing this stop
attachment is more particularly to prevent the feeding of the joined ends of
different sheets of the paper to the embossing roller, the said thickened portion of the
paper having a tendency to mar the impression roller and produce inferior work on
the remaining paper fed thereto.
A practical embodiment of my invention is represented in the accompanying
drawings, in which
Figure 1 represents an end view of an embossing machine with my improved stop
attachment applied thereto.
Figure 2 is a partial front view of the same.
Figure 3 is a vertical section through the machine on the line 3-3 of Figure 2.
Figure 4 is a view of the latch bar and its adjacent parts, the latch bar being shown
in full lines engaged with its catch and in dotted lines in the position which it
assumes when raised by the tripping arm.
Figure 5 is a view of the same parts showing the position which they assume after
the latch bar has been released,
Figure 6 is a vertical cross section in the plane of the line 6-6 of Figure 5, and
Figure 7 is a detail view of the tripping arm operating cam.
A, A¹, designate the side frames of the embossing machine between which are
mounted the usual embossing roller B and impression roller C. These rollers are
geared together by spur gears b, c, exterior to the side frame A.
The impression roller B is geared to and rotated by a drive shaft D suitably mounted
in the machine, which drive shaft is provided with a flat or drive pulley d and a loose
pulley d. The drive shaft D is rotated by a belt E running to a source of power not
shown.
A belt shifter F is mounted to reciprocate upon suitable guide rods f, f, extended
outwardly from the side frame A. This belt shifter F is provided with a suitable
loop which engages the drive belt E.
A guide roll G is mounted across the front of the machine in suitable vertically
adjustable bearings g and a smaller guide roll H is mounted between the side
frames, A, A¹, at a point to the rear and slightly below the guide roller G.

page_text: "
A roll of paper I is wound upon a suitable beam i which is mounted in suitable
supporting brackets i¹ on the side frames A, A¹, at the front of the vertically adjust-
able guide roll G. The paper is led over the guide roll G under the guide roll H
and between the embossing roller B and the impression roller C and from thence
partially around the roller C and is then led from the machine.
The automatic stop attachment which I have provided for stopping the machine
when paper of an undue thickness is being fed thereto consists of the following
parts:
A roller J is mounted in suitable bearings ; on the side frames A, A¹, the said
roller J being located directly above the guide roller G, the distance between the two
rollers being accurately adjusted by the raising and lowering of the said roller G.
The distance between these two rollers is just sufficient to permit the paper of the
required thickness to pass therethrough without engaging the roller J but the space
is so small that, if the paper should be increased in thickness as by the overlapping
of two adjacent ends or by wrinkling or folding of the paper, the roller J would be
rotated. A cam K is secured to the end of the shaft of the roller J exterior to the
side frame A.
A tripping arm L is hinged at to the side frame A and at its free end the said
arm is provided with a roller which rests upon the periphery of the cam K. This
cam is preferably provided with a slightly depressed portion within which the roller
seats so that the roller J will not be caused to rotate unintentionally as, for instance,
by the jar of the machine.
A rock shaft M is mounted in suitable bearings m upon the side frame A which
shaft is provided with front and rear upwardly extended arms m¹, m², the arm m¹
being provided with a suitable handle m³ at its free end. The free end of the rear
arm m² is connected with the belt shifter F by a connecting bar m¹ whereby the
rocking movement of the shaft M will cause the belt shifter to shift the belt E from
one to the other of the fast and loose pulleys d, d¹, on the drive shaft D.
A retracting spring N extends from the end plate f³ of the belt shifter guide to
the arm m², the tendency of the said spring being to shift the belt E from the fast
pulley onto the loose pulley.
The belt shifter F is held against the tension of the spring N with the driving belt
in engagement with the fast pulley d by means of a latch bar O hinged at o to the
upwardly extended front arm m¹ of the rock shaft M, which latch bar is provided with
a suitable notch o' which is engaged by a catch P secured to the front of the side
frame A.
The latch bar O is provided with a lug o² which rests in close proximity to the top
of the tripping arm L when the latch bar is held in its locked position.
To positively ensure the working of the stop attachment instantaneously, the
roller J is flattened along the element of surface normally adjacent to the roller G as
shown, thereby causing the space between the two rollers to be decreased immediately
after the roller J is started in its movement by the engagement of the thickened
portion of the paper, thus ensuring the firmer gripping of the paper by the rollers
preventing it from slipping there-between.
The operation of my, attachment is as follows:
As the paper is being fed to the machine when a thickened portion thereof passes
between the rollers G and J, the said thickened portion will cause the roller J and its
cam K to rotate thereby swinging the tripping arin L upwardly which in turn will
raise the latch bar O and release it from its catch. The retracting spring N will rock
the shaft M outwardly thereby causing the belt shifter to shift the belt E from the
fast pulley d onto the loose pulley d¹ and cause the machine to stop.
After the thickened portion has been removed as for instance by cutting it out of
the strip, the machine may be again started by grasping the handle m³ of the front
arm m¹ of the rock shaft M and rocking the shaft inwardly until the latch bar O drops
into engagement with its catch.
By the use of this automatic stop attachment the paper which is being fed to the

page_text: embossing machine does not have to be watched by an attendant and the class of
work turned from the machine is much better for the reason that the surface of the
impression roll is not unduly indented by thickened portions of the paper passing
between the embossing roller and the said impression roller.
For causing the machine to stop, if the paper being delivered therefrom should start
to wrap itself around the impression roller, I provide a roller Q mounted in bearings q
carried by the side plate A, A¹. This roller is located at a point to the front of the
impression roller C and may be adjusted toward and away therefrom until the space
between the rollers is just sufficient to cause the roller Q to rotate if the paper should
start to pass between them. This auxiliary roller Q is connected to the roller J by
means of a belt q¹ whereby the rotary movement of the roller Q will be communicated
to the roller J and thereby operate the tripping device.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is
1. In a paper embossing machine, a stop attachment located in position to be
operated by the unusual thickness of the paper being fed to the machine to
automatically stop the operation of the machine, substantially as set forth.
2. In a paper embossing machine, embossing and impression rollers mounted
therein, mechanism for driving the said rollers and a stop attachment connected with
the said driving mechanism, the said stop attachment being under the control of the
paper being fed whereby an unusual thickness of the paper will cause the attachment
to automatically stop the driving mechanism, substantially as set forth.
3. In a paper embossing machine, embossing and impression rollers between which
the paper is caused to pass, a drive shaft connected therewith and having fast and
loose pulleys and a drive belt, a stop attachment engaged by the paper and adapted
to be operated by the unusual thickness of the same and a belt shifter connected to
the said attachment for shifting the belt to stop the machine when the attachment is
operated, substantially as set forth.
4. A stop attachment comprising a roller, a cam carried thereby, a tripping arm
engaged with the cam, a latch bar under the control of the tripping arm, a belt
shifter and a rock shaft having one arm connected with the belt shifter and another
arm connected with the latch whereby the movement of the said roller operates the
belt shifter, substantially as set forth.
5. A stop attachment comprising a roller, a cam carried thereby, a tripping arm
engaged by the cam, a latch bar in position to be engaged by the tripping arm, a belt
shifter, a rock shaft having one arm connected to the belt shifter and another arm
connected to the latch bar, a spring tending to hold the belt shifter at the limit of
its movement in one direction and a catch engaging the latch for holding the belt
shifter at the limit of its movement in the other direction, substantially as
set forth.
6. In a stop attachment for paper embossing machines, a guide roller, a second
roller mounted in promixity to the first-named roller, stop mechanism under
the control of the said second roller, the said second roller being flattened
along its element of surface normally adjacent to the first-named roller whereby the
space between the two rollers will be decreased when the second roller is rotated,
substantially as set forth.
7. A stop attachment comprising a roller, a cam carried thereby having a
depression in its periphery, a tripping arm having its free end normally resting in
said depression, and stop mechanisin adapted to be engaged by said tripping arm
when the roller is rotated, substantially as set forth.
8. In a paper embossing machine, embossing and impression rollers between which
the paper is caused to pass, a driving mechanism therefor, an operating roller
mounted in proximity to the impression roller and adapted to be rotated by
the passage of paper between it and the impression roller and a stop mechanism

page_text: under the control of the movement of the said operating roller, substantially
as set forth.
Dated this 25th day of February 1898.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.