IMPROVEMENTS IN MACHINES FOR GLAZING OR FINISHING PAPER
Year: 1878

page_text: PROVISIONAL SPECIFICATION left by Alexander Melville Clark at the Office
of the Commissioners of Patents on the 27th February 1878. A communica-
tion from abroad by Auguste Hippolyte Marinoni, of Paris, France.
ALEXANDER MELVILLE CLARK, of 53, Chancery Lane, in the County of Middlesex,
Patent Agent.
"IMPROVEMENTS IN MACHINES FOR GLAZING OR FINISHING PAPER."
[A communication from abroad by Auguste Hippolyte Marinoni, of Paris, France.]
This Invention relates to improved machinery for glazing or finishing paper in
the roll or continuous web form, as used in certain printing machines, the glazing
or finishing process having been hitherto applicable only to paper in the sheet.
The machine is shown in transverse vertical section in the accompanying Drawing.
The paper after being first damped is wound upon a hollow roller, in whose ends
are fitted journals supported in bearings A provided with pressure blocks and
screws B bearing upon the journals to keep the paper at the proper tension. The
paper passes thence around the tension rollers C, C, and between a paper covered
cylinder E' and a glazing cylinder of hard metal D', by whose pressure it receives
a glaze or polish on one side; the paper then passes between the two paper covered
cylinders E, E, and back between the cylinder E' and the glazing cylinder D² of
metal
That side of the paper which was next the metal cylinder when passing between
D, E, is now next the paper cylinder E³, and the side which was next the
paper cylinder is now presented to the metal cylinder D. Both sides of the
paper will in this manner be glazed to an equal extent.
The paper on leaving the glazing cylinders is wound upon another mandril or
roller F, similar to A, and whose journals slide in vertical guides F' placed imme-
diately above the axis of a drum G driven by toothed wheels O, P, R, and made of
the same diameter as the glazing cylinders, the paper being wound up by the surface
friction of the drum G at the same speed that it was unwound.
Upon the axis of the roller F is mounted a friction roller, upon which bears a
weighted lever J, of the form shown, in order to press the paper roll down upon
the drum G and ensure it being wound up regularly, but any other suitable means
may be adopted for the purpose.

page_text: The lever is so arranged as to adopt itself to the varying position of the roller F
as the roll of paper increases in diameter, and also to reduce the pressure of the lever
on the roller as the weight of the roll of paper increases; the pressure of the
weighted lever being more particularly necessary at first only while the roll of paper
is small.
:-
The following relates to further details in the mode of working of the machine :-
The metal cylinder D2 has a gear wheel O at one end driven by a pinion on the
main shaft K, and the cylinder D2 drives the cylinder E by friction. The cylinder
E has a toothed wheel at one end in gear with another similar wheel on the end
of cylinder E. These two wheels are of slightly larger diameter, measured at their
pitch circles, than the diameter of their cylinders, which latter are encircled by a
metal ring or collar at each end, corresponding in size to the pitch circles of the
wheels, so that the cylinders shall only touch each other at their ends and allow the
paper free passage between them. These rings are placed at the ends of the
cylinders in order that cylinders D1, D2, which are shorter than E1, E2, may come
between the rings. The cylinder E2 is driven by the friction of cylinder E', and
also by the toothed wheels on the ends of said cylinders.
All the cylinders are mounted in movable bearings sliding in uprights of the
frame, to render the pressure of all the cylinders uniform, this pressure being applied
by the weighted levers H acting on lever arms I through the connecting rods L,
the levers arms I pressing upon the bearings of cylinder D', by which the pressure
is transmitted to the whole of the cylinders.
By varying the weight upon lever H, the pressure may be regulated as desired.
In order to keep the metal cylinders D', D2, perfectly clean and free from any
adhering matter, which is an indispensable condition, blades or scrapers M³, M², are
applied to their peripheries, together with rubbers N1, N2, covered with felt, as
shown, said rubbers and scrapers having a to-and-fro movement imparted to them.
Instead of covering the cylinders E', E2, with compressed or hardened paper, as
described, they may be made of hard india-rubber, or even of metal.