An Improvement in Photographic and Typographical Printing Frames, Presses, and Machines.
Year: 1898

page_text: Date of Application, 3rd Jan., 1898
Complete Specification Loft 1st Oct 1808 Accented 3rd Dan
1800
Date of Application, 3rd Jan., 1898
Complete Specification Loft 1st Oct.
1808 Accepted, 3rd Doc, 1808
PROVISIONAL SPECIFICATION.
An Improvement in Photographic and Typographical Printing
Frames, Presses, and Machines.
CHARLES DUCKETTE HARRISON, 21, Cannon Street, Manchester (trading as
Harrison & Son), Mechanical Engraver on Wood. I do hereby declare the nature
of this invention to be as follows:
A hollow chamber or number of chambers pad or number of pads, made of
india-rubber and clothe or other suitable material, said chambers or pads to
contain air under pressure or otherwise, and to be attached to printing frames,
presses and machines, in such method as may be found most suitable.
Dated this 31st day of December 1897.
CHARLES DUCKETTE HARRISON.
An Improvement in Photographic and Typographical Printing
Frames, Presses, and Machines.
I, CHARLES DUCKETTE HARRISON, Mechanical Engraver on Wood, of 21, Cannon
Street, Manchester, 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 improvements are devised with a view to afford increased facilities in
photographic and typographical printing cheifly in photo process work such for
instance, as printing on paper, stone wood, metal and other meterial of a simular
nature, especially when the latter are of an uneven character, as also to avoid
the breaking of glass plates, when under pressure generally in all cases, where
elasticity is requisite and immunity from breakage is desired to be secured, and
at the same time ensureing increased speed and pressure in printing owing to
the resilient properties of the chambers and pads according to my invention.
In the accompanying sheet of explanatory drawings I describe and explain
as follows.
In carrying out my invention I employ hollow chambers or pads, (D, Fig. 1)
of india rubber surrounded with cloth, canvas, wood metal, or other suitable
meterial, adapted to withstand the pressure of air or gas introduced and contained
within the chambers or pads (D) as heretofore mentioned. The said hollow
chambers or pads is secured to the lid of printing frame (E) or machines say
with a suitable cement or other efficient means and is inflated with air or gas
under pressure.

page_text: I may use for the purpose of enflating any ordinary forcing pump or like
device, the air or gas under pressure being introduced to the interior of the hollow
chamber or pad (D) through a small duct formed in any part of the chamber or
pad, as may be found most suitable, and provided with inflating and deflating
valves (K and L Fig. 2.
I further employ in carrying out my invention in photographic printing frames
india rubber strip, felt or any other suitable meterial on the rabbet (B, B, Fig. 1)
which projects on the inside of printing frame (A, Fig. 1) said india rubber
strip or felt, is secured to the rabbet with a suitable cement or other effecient
means.
When the rubber strip is fixed to the aforesaid rabbet a resesting plat of
glass (C, Fig. 1) is laid on the rabbet (B, B) and on the plate glass (C) a
negative (I) on the negative senstesed paper or metal plates (J, J, Fig. 1).
The hollow chambers or pads are secured to the lid (E) Fig. 1) and on the
lid are fixed battons (F, F) and F, F, F, (Figs. 1 and 3) the ends of battons
project one inch or more over the sides of lid (E) and chamber (D) the lid and
chamber are then fitted into the printing frame (A A) and the battons resting
on the printing frame A A) as heretofore mentioned.
Secured in the sides of said printing frame A, A) are two hooked hinged lock-
bolts, H, H (Figs. 1 and 3) which are turned upwards, over the ends of battons
pressure is then applied.
In typographical printing presses and machines I use a hollow chamber or
pad hermetically sealed higher pressure being obtained by screws cams or levers.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed what I claim is:-
1. For photographic & typographical printing frames presses & machines.
The employment of hollow chambers or pads of india rubber, inflated with air
or gas under pressure substantially as herein set forth and described.
2. The employment of rubber strip or felt or other suitable meterial, in and
on the rabbet of a photographic printing frame herein described.
3. The employment of a hooked hinged lockbolt in photographic printing
frames as herein described.
Dated this day 30th of September 1898.
C. D. HARRISON,
21, Cannon Street, Manchester.