Improvements in or relating to Apparatus for Glazing Paper.
Year: 1891

page_text: Date of Application, 6th Aug., 1891
Complete Specification Left, 6th May, 1892-Accepted, 30th July, 1992
.. PROVISIONAL SPECIFICATION.
Improvements in or relating to Apparatus for Glazing Paper.
A communication from ADAM BACHEM, Engineer and Manager of Works, Löbtau,
Dresden, and ALBIN VOGELSANG, Engineer, and GEORG TISCHER, Merchant,
both of 11, Freibergerstrasse, Dresden, in the German Empire.
I, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
M.I.M.E., do hereby declare the nature of this invention to be as follows:-
The method hitherto adopted in glazing paper consists in causing the paper to
pass between a number of rollers arranged vertically one above the other, the
lowermost roller alone receiving motion from the driving mechanism, while the
remaining rollers simply move by friction. The paper to be glazed is fed at
the top and travels downwardly, and all the rollers acting thereon work under high
pressure. It has been found by experience that the greater the number of rollers
and the higher the pressure, the more highly finished is the glazing obtained.
Now it is clear that paper 'treated by this method sustains both pressing and
pulling strains, owing to the fact that the friction between the rollers steadily
increases towards the upper part. As a matter of fact the fibres of the paper, in
this process, are strained up to,-and frequently beyond, the extreme limit of
their elasticity, and in order to produce a better glazing effect the number of rollers
is constantly increased-as many as twelve rollers being employed in some cases :-
and even more rollers would be used were it not that the paper is incapable of
resisting a greater pulling strain. It is however the pressure alone that produces
the glazing, while the " pull" is merely an objectionable feature inherent to the
construction of the machine.
It is therefore the object of the present invention to submit the paper to be
glazed to pressure only, while relieving it from the pulling strain.
The paper is conducted from the rolls over guide rollers then between plates
preferably of zinc, held apart by light springs and into a hydraulic press.
Hence
it is made to pass over guide-rollers on to a drum and is either cut right across
in passing between knives or it passes on to other rollers upon which it may be
wound.
From the driving or other shaft motion is imparted to another shaft through the
medium of a link and a rocking motion is thus conveyed to a toothed segment the
teeth of which gear with a toothed wheel mounted upon the shaft of the drum. By
this means the drum receives a reciprocating motion.
The toothed segment is fast on a shaft as are also two levers. As the shaft
reciprocates, either of two rollers is by one of a pair of links alternately pressed:
against the drum and while in contact with it, receives rotary motion therefrom.
A link serves to raise or lower a block arranged above another block. By means
of a belt motion is conveyed from the roller to the toothed wheel and through it to
other wheels. From the roller another belt transmits motion to a shaft which
through the medium of an eccentric imparts a reciprocating motion to another
lever. From the same shaft are displaced a cam, a link, a bell-crank lever and
a slide which are then restored to their original positions again by a spring.
Within a vertical cylinder a piston or plunger is adapted to move up and down,
the rod of which carries another piston or plunger similarly moving within an
upper cylinder of smaller size. Above this cylinder a basin filled with water is
arranged being connected with the cylinder by a short tube; within this tube is
fitted a valve, which closes when the plunger in the upper cylinder rises and
automatically opens as the said plunger descends. At the upper end of the upper
cylinder is arranged a short side tube from which a pipe leads to the slide valve!

page_text: When the lever is drawn forward both the link and (through another lever) another
link are also moved forward, thereby first connecting the first pipe with a second
pipe but cutting off this connection again as they advance further; and at the same
time connecting a third leading to the water reservoir of the accumulator. As the
lever is forced back one set of the pipes is closed and so during the first of its
movement are other pipes; but as it is further swung backwards connections are
changed.
Underneath the main water reservoir of the hydraulic press is arranged another
smaller water reservoir unconnected with the main reservoir; the plunger of which.
is connected by the crosshead and link with the table or platform of the press.
The operation is as follows:
When the press is open, the roller is in contact with the drum which is here
assumed to be moving forwards, so that the paper caught between it and the roller
advances with the drum, when it is desired to roll up the paper upon the recls or
spools provided for the purpose, the rotary motion of the roller is by the beli
transmitted to the wheels. When, however, the paper is to be cut across, the beli
is removed and the paper is caused to pass between the two blocks and carried on
to the knives. At the moment when the oscillating toothed segment has reached
the point from which it should begin its return stroke, the roller is raised by the
drum through the medium of the lever and link while at the same time another
roller is pressed against the drum by its link. The rotary motion of the roller and
of the wheels of the rolling or winding apparatus then ceases; whereas in the case
of the knives being employed the action of the lever and link causes the first
block to descend upon the other block so that the paper is retained between the two
and may be cut by the knives.
When the other roller is pressed against the drum it receives rotary motion from
the latter so that through the medium of the belt the shaft is revolved. In the
first place the cam will depress the links together with the slide when steam under
pressure is admitted through the pipe underneath the plunger in the cylinder so
that this plunger and also that of the upper cylinder are raised. The result is that
the valve in the tube is closed, and the water contained in the cylinder above the
plunger is forced out.. By this time the crank shaft and the lever have been drawn
forward so that through the medium of the lever and rod the pipes are connected.
The water therefore passes into the water reservoir thereby forcing upwards the
plunger of the hydraulic press, so that the said reservoir is filled with water without
actually exercising any pressure. As the lever further advances the connection
between the other set of pipes is cut off, while the pipe leading to the water cylinder
of the accumulator is connected with its set of pipes so that the atmospheric
pressure of the accumulator cylinder is temporarily transferred to the water
reservoir of the hydraulic press.
The lever then recedes, cuts off the connection with the one set of pipes but
connects the others so that the accumulator pressure is transferred to the small
water reservoir the plunger is thereby depressed, while the water contained in the
reservoir is forced back into the basin..
•
· Dated this 6th day of August 1891.
W. P. THOMPSON & BOULT..
Agents for the Applicant.
°
COMPLETE SPECIFICATION.
Improvements in or relating to Apparatus for Glazing Paper.
A communication from ADAM BACIEM, Engineer and Manager of Works, Löbtau, 50
Dresden, ALBIN VOGELSANG, Engineer, and GEORG TISCHER, Merchant,
both of 11, Freibergerstrasse, Dresden, in the Empire of Germany:
1, ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Member of the Institution of Mechanical Engineers, do hereby declare the nature
.

page_text: 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 :-
The method hitherto adopted in glazing paper consists in causing the
paper to
pass between a number of rollers arranged vertically one above the other, the
Towermost roller alone receiving motion from the driving mechanism, while the
remaining rollers simply move by friction. The paper to be glazed is fed at the top
and travels downwardly and all the rollers acting thereon. work under high
pressure.
It has been found by experience that the greater the number of rollers and the
higher the pressure, the more highly finished is the glazing obtained.
Now it is clear that paper.treated by this method sustains both pressing and
pulling strains, owing to the fact that the friction between the rollers steadily
increases towards the upper part.
As a matter of fact the fibres of the paper in this process are strained up to-
and frequently beyond-the extreme limit of their elasticity, and in order to
produce a better glazing effect the number of rollers is constantly increased-as
many as twelve rollers being employed in some cases-and even more rollers would
be used were it not that the paper is incapable of resisting a greater pulling strain.
It is however the pressure alone that produces the glazing, while the " pullis
merely an objectionable feature inherent to the construction of the machine.
It is therefore the object of the present invention to submit the paper to be
glazed to pressure only, while relieving it from the pulling strain.
Figs. 1 & 2 are divided parts of the same elevation of apparatus constructed
according to this invention and Fig. 3 is a detail view of portion of the same.
The paper is conducted from the rolls 1 (Fig. 1) over or under guide rollers 2,
then between plates 4 preferably of zinc (held apart by light springs 3) in a
hydraulic press 5. Hence it is made to pass over guide-rollers 6 and 7 (Fig. 2)
onto a drum 8 and is either cut right across in passing between knives / h¹ or it.
passes on to other rollers 9 upon which it may be wound.
From the driving or other shaft 10 (Fig. 2) motion is imparted to another shaft 11
and through the medium of a link 12 a rocking motion is conveyed to a toothed
segment 13, the teeth of which gear with a toothed wheel 14 mounted upon the
shaft of the drum 8. By this means the drum 8 receives a reciprocating motion.
The toothed segment 13 (Figs. 2 & 3) is fast on a shaft 15 as are also two
arms 16 and 17. As the shaft 15 reciprocates the arms 16 and 17 are also
reciprocated through the medium of the mitre wheel 13ª integral with 13, inter-
mediate mitre wheel 13 and mitre wheel 13° formed with clutch projection 134
which at proper times comes against the clutch projection 15" integral with the
boss 15° of arms 16 and 17 so that either of two rollers 20 and 21 is by one of a
pair of links 18 and 19 alternately pressed against the drum 8 and while in contact
with it receives rotary motion therefrom.
A link 22 Fig. 2 serves to raise or lower a block 23 arranged above another
block 24.
By means of a belt 25 motion is conveyed from the roller 20 to the
toothed wheel 26 and through it to other wheels 26, 26", 20, 26, 26 and 26.
From the roller 21 another belt 27 transmits motion to a shaft 28 which through
the medium of a rod 29 imparts a reciprocating motion to another lever 30. From
the same shaft 28 are displaced a cam 31, a link 32, a bell-crank-lever 33, and a
slide 34 which are then restored to their original positions again by a spring 35.
Within a vertical cylinder 36 (Fig. 2) a piston or plunger is adapted to move up
and down the rod of which carries another piston or plunger similarly moving
within an upper cylinder 37 of smaller size. Above this cylinder 37 a basin 38
filled with water is arranged being connected with the cylinder 37 by a short
tube 39 within this tube is fitted a valve which closes when the plunger in the
upper cylinder 37 rises and automatically opens as the said plunger descends. At
the upper end of the upper cylinder 37 is arranged a short side tube 40 from which
a pipe 41 leads to the slide valve 42. When the lever 30 is drawn forward both

page_text: the link 45, and (through the lever 43) the link 44 are also moved forward, thereby
first connecting the pipe 41 with the pipe 46 but cutting off this connection again
as they advance further and at the same time connecting the pipe 47 leading to the
water reservoir of the accumulator. As the lever 30 is forced back the pipes 41
and 46 are closed and so during the first of its movement are the pipes 47 and 48:
but as it is further swung backwards the pipes 47 and 46 are connected with the
pipes 49 and 50 respectively.
Underneath the main water reservoir 51 (Fig. 1) of the hydraulic press is
arranged another smaller water reservoir 52 unconnected with the main reservoir
the plunger of which is connected by the cross-head 53 and link 54 with the table
or platform 55 of the press.
The operation is as follows,-
When the press is open as shown the roller 20 (Fig. 2) is in contact with the
drum 8 which is here assumed to be moving forwards so that the paper caught
between it and the roller 20 advances with the drum. When it is desired to roll
up the paper upon the reels or spools provided for the purpose the rotary motion of
When however the
the roller 20 is by the belt 25 transmitted to the wheels 26.
'paper is to be cut across, the belt 25 is removed and the paper is caused to pass
between the two blocks 23 and 24 and carried on to the knives. At the
moment when the oscillating toothed segment 13 (Figs. 2 and 3) has reached the
point from which it should begin its return stroke the roller 20 is raised from
the drum 8 through the medium of the lever 16 and link 18 while at the same time
the roller 21 is pressed against the drum 8 by the link 19. The rotary motion
of the roller 20 and of the wheels 26 of the rolling or winding apparatus then
ceases; whereas in the case of the knives being employed the action of the lever 17
and link 22 causes the block 23 to descend upon the other block 24 so that the
paper is retained between the two and may be cut by the knives hh'.
When the roller 21 (Fig. 2) is pressed against the drum S it receives rotary
motion from the latter so that through the medium of the belt 27 the shaft 28 is
revolved. In the first placé the cam 31 will move the links 32 and 33 together
with the slide 34 when steam under pressure is admitted through the pipe 56
underneath the plunger in the cylinder 36 so that this plunger and also that of the
cylinder 37 is raised. The result is that the valve in the tube 39 is closed and the
water contained in the cylinder 37 above the plunger is forced through the tube 40
into the pipe 41. By this time the crank shaft 29 and the lever 30 have been
drawn forward so that through the medium of the lever 43 and rod 44 the pipes 41
and 46 are connected. The water therefore passes through the pipe 46 (or 46")
into the water reservoir 51 thereby forcing upwards the plunger of the hydraulic
press so that the said reservoir is filled with water without actually exercising any
pressure. As the lever 30 further advances the connection between the pipes 41
and 46 is cut off, while the pipe 47 leading to the water cylinder 57 (Fig. 1) of the
accumulator 58 is connected with the pipe 46 (or 46") so that the atmospheric
pressure of the accumulator cylinder is temporarily transferred to the water
reservoir of the hydraulic press.
The lever 30 then recedes, cuts off the connection with the pipe 48 but connects 47
and 49 and also 46" (or 46) with 50 so that the accumulator pressure is transferred
to the small water reservoir 52, the plunger in 52 is thereby depressed while the
water contained in the reservoir 51 is through the pipes 46* (or 46) and 50 forced
back into the basin.
Having now particularly described and ascertained the nature of the said inven-
ion, as communicated to me by my foreign correspondents, and in what manner
he same is to be performed, I declare that what I claim is,-
1. The method or process of glazing paper without passing it between heated
rollers by submitting it to the action of flat plates under heavy pressure substantially
as specified.

page_text: 2. The method or process of glazing paper by pressure only substantially as
specified.
3. In an apparatus for glazing paper by pressure the combination with a press
of a set of supply rolls and a set of receiving rolls whereby several webs of paper
may be pressed simultaneously substantially as specified.
4. In an apparatus for glazing paper by pressure the combination with a roller 8
of a toothed segment 13 for the purpose of rotating it in opposite directions.
5. In an apparatus for glazing paper by pressure the combination with rollers 8
and 20 of link 18 arm 16 and rocking shaft 15 substantially as and for the purpose
specified.
6. In an apparatus for glazing paper by pressure the combination with rollers 8
and 20 of rocking shaft 15 arms 16 and 17 links 18 and 22 blocks 23 and 24 and
knives' substantially as and for the purpose specified.
Dated this 6th day of May. 1892
ALFRED J. BOULT,
Chartered Patent Agent.