Improvements in or connected with Machinery for Varnishing or otherwise Coating Paper or other Flexible Material.
Year: 1895

page_text: Date of Application, 15th May, 1895-Accepted, 15th June, 1895
COMPLETE SPECIFICATION.
Improvements in or connected with Machinery for Varnishing or
otherwise Coating Paper or other Flexible Material.
I, EDMUND BUSH of Stratford Street, Dessbury Road, Leeds, in the County
of York, Engineer, 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 :-
The object of my invention is to construct machinery for varnishing or otherwise
coating paper or other flexible material (hereinafter called paper), in a more simple
and efficient manner than heretofore, and machines so constructed are capable of
rapidly executing a larger amount and better quality of work than machines
hitherto employed.
In order that my invention may be clearly understood, I will proceed to describe
same with reference to the accompanying drawings, in which similar letters refer
to like parts in all the figures.
Fig. 1 is a side elevation of a machine constructed according to my invention, and
Figs. 2, 3, 4, 5, 6, 7 and 8 are detail views.
According to my invention I employ a framework A composed of two side
frames which are stayed together by bolts and cross framing. A cylinder B is
mounted on a shaft B which is carried in bearings situated in the side frames A,
and the said cylinder is of the continuous rotating type. D and E are rollers,
the roller E being covered with elastic material and the roller D is made to
revolve in a varnish trough F, from which it carries a suitable amount of varnish
to the roller E, which in its turn supplies the varnish to the work on the
cylinder B as the latter rotates. A is a feed table attached to the framework
and located below the varnishing rollers D and E and trough F.
The main shaft C, cylinder B and the two varnishing rollers D E are geared
together by means of spur wheels C', B', E' and D₁, so that the cylinders and
rollers rotate at an equal speed. G is a varnish reservoir which contains the
supply, and a pump H and tubing H', are provided for raising the varnish to the
trough F at a suitable rate to meet the requirements of the machine, and H' is an
overflow pipe to return the superfluous varnish to the reservoir G.
The pump H is actuated by a connecting rod J, which is connected to a pin on
a crank E', situated on the extremity of the roller E, and the crank E' in rotating.
works the pump at a suitable speed.
On the shaft BI mount a cam K, which through the medium of a roller L',
actuates a lever L fulcrummed at L'. A spring rod M is connected to the lever L
in such a manner as to press the roller L' upon the face of the cam K. N is a
fixed guide which carries a slide P within same, and a rod P¹ connects the said
slide P to the end of the lever L.
A similar cam and lever arrangement is employed on the opposite side of the
machine, and a rocking shaft R provided with fingers R' is carried by the slides P,
which hold same parallel to the cylinder B. R' is an arm, which is mounted on
the end of the rocking shaft R, and the said arm R³ is connected by means of a
ink L' to the fulcrum L³.
A rotating roller S is mounted in fixed bearings situated on the guides N, and
he said roller S carries endless travelling bands S', the said bands S₁ being
tretched over roller S² carried on brackets S attached to the framework A of the
achine.

page_text: Grippers T are carried on a shaft T', and a slide T is attached to the end of the
shaft T', being held in position by the spring rod T³. T is a fixed pin situated on
the framework A, which reverses the position of the slide T, on the revolution of
the cylinder B, and T is a second pin which is situated on the framework of the
machine and outside the path of the shaft T', so that on the continued rotation of
the cylinder, it returns the slide T and with it the grippers T to their normal
positions.
Across the cylinder B I mount a shaft V having a square rod V₁ inserted
therein, so as to receive the free end of the blanket W, and the said blanket W is
held tightly upon the shaft V, by means of a ratchet wheel V' and pawl V*, situated
on the end of the cylinder B.
The paper to be varnished is fed up to the stops in the ordinary way, and on the
cylinder B arriving at the proper position, the grippers T take hold of the paper
and carry it behind a guiding roller 'Y, which latter holds it in close contact with
the cylinder. The sheet then passes behind the varnish roller E, which is supplied
with a coating of varnish from the trough F, through the medium of the roller D,
and the said roller E completely and evenly varnishes the sheet. As the cylinder
rotates, the pin T enters the slide T' as shown at Fig. 3, which slide becoming
suddenly twisted rocks the shaft T', and throws the grippers T into the open
position. During the latter portion of the movement of the cylinder B, the
roller L' has been in contact with the smaller portion of the cam K, and thus the
lever L has been holding the slides P, carrying the rocking shaft R, in the upward
position with the fingers R' projecting into a cut away portion of the cylinder B,
as shown at Fig. 7. The front edge of the paper, which is already freed from the
grippers T, is thus received over the front edge of the fingers R', and at this
moment the roller L' coming to the change in the cam K, rocks the lever L which
lowers the rocking shaft R, at a speed equal to that of the cylinder B, at the same
time causing the fingers R¹ to recede from the cylinder B, by reason of the rocking
action produced by the arm R' and link L³, to the position shown at Fig. 8. The
fingers R¹ now stop, but they are sufficiently withdrawn to allow the cylinder B
to pass, and as the latter continues its movement, the sheet is fed onto the
continuous travelling bands S', with the varnished surface in the upward position.
This machine has several important advantages over machines hitherto employed,
owing to its simplicity and the compact arrangement of the operative parts. The
arrangement of the varnishing rollers and trough above the feed table A¹ enables
the machine to coat a sheet during a short portion of a revolution, and the pump
arrangement keeps the trough well supplied with varnish from the reservoir.
The fingers on the rocking shaft guide the sheet face upwards to the travelling
bands, thus entirely dispensing with overhead taking off chain mechanism.
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 varnishing or other coating machine, the varnishing rollers and trough
situated high up on the machine and fed with a constant supply of varnish, by
means of a pump, substantially as and for the purposes set forth.
2. In a varnishing or other coating machine, the varnishing rollers and parts
-connected therewith, in combination with the feed table, situated below the
varnishing rollers, and the gripping mechanism on the cylinder, substantially as
and for the purposes set forth.
3. In a varnishing or other coating machine, the fingers R', rocking shaft R,
and slides P, actuated by suitable mechanism, substantially as and for the purposes
set forth.
4. In a varnishing or other coating machine, the fingers R', rocking shaft R,
slide P, rod P¹, guide N, cam K, lever L, roller L', fulcrum L, and spring rod M,
substantially as and for the purposes set forth.
5. In a varuishing or other coating machine, the combination of the feed table,

page_text: the varnishing mechanism, the cylinder, and the fingers, substantially as and for
the purposes set forth.
6. In a varnishing or other coating machine, the varnishing mechanism and
cylinder, in combination with the endless travelling bands, substantially as and for
the purposes set forth.
7. The general arrangement, construction and combination of the various parts
forming the machine for varnishing or otherwise coating paper or other flexible
material, substantially as herein set forth.
Daveu HIS 1 un
BREWER & SON,
London and Leeds, Agents for Applicant.
BREWER & SON,
London and Leeds, Agents for Applicant.