STRETCHING OR STRAINING PAPER PHOTOGRAPHIC FILMS &c
Year: 1886

page_text: Date of Application, 9th Mar., 1886.
Complete Left, 9th Dec., 1886.
Complete Accepted, 9th Mar., 1887.
other Purposes.
WILLIAM THOMAS MORGAN & ROBERT LEAMON KIDD Photographic Paper Manu-
facturers Kew Foot Road Richmond Surrey do hereby declare the nature of our
invention for STRETCHING OR STRAINING PAPER PHOTOGRAPHIC FILMS &c. to be as
follows:-
:-
The instrument consists of a rectangular framework made of metal or any suitable
substance. On each of its sides is hinged a strip of hard metal slightly wider than
the framework. The outside edge of each strip & the inside edge of framework are
turned up to form a rim & are so arranged that when the hinged strips are closed
down on their hinges their rims fit tightly or snap over the rims of the framework
beneath. The hinged strips are indented, ridged or corrugated so that the ridges &c.
project from their underneath surfaces & on closing on to the framework touch its
corresponding surface which is provided with indentations &c. to. receive them,
immediately before the edges of their rims overlap.
The instrument is so designed as in one movement to grip the borders of the paper
to be strained & to stretch it from all four sides in a perfectly even surface and with
the same movement to press it up to any required plane. For straining the paper,
films &c. we open the hinged strips at right angles to the framework, & place in
position in the frame thus formed the paper, film &c. to be strained which should be of
a size to fit it loosely. We now close down lightly the hinged strips on the paper,
film, &c., & placing a flat level board, or anything possessing a flat rigid surface, large
enough to cover the whole of the framework, upon the closed down hinged strips
exert pressure sufficient to snap their rimmed edges over those of the framework
beneath.
The objects of the indents, ridges, or corrugations or the inside of the upper strips
is to maintain the paper, film &c. in its proper position when straining. On shutting
the hinged strips down on the framework these projections come first in contact with
the paper & hold it in position. Upon the rims of the hinged strips being snapped
simultaneously over those of the framework the paper, films, &c., is pressed forward by
them and strained from all sides. The rim of the hinged strips is made so much
deeper than those of the framework as is necessary to press the paper forward until it
lies in the same plane as the underneath surface of the framework.

page_text: Stretching or Straining Paper for Use for Photographic or
other Purposes.
We WILLIAM THOMAS MORGAN and ROBERT LEAMON KIDD. both of "Rosedale "
Kew Foot Road Richmond in the County of Surrey Manufacturers of Photographic
Papers do hereby declare the nature of our invention for AN INSTRUMENT FOR
STRETCHING OR STRAINING PAPER FOR USE FOR PHOTOGRAPHIC OR OTHER PURPOSES,
and in what manner the same is to be performed, to be particularly described and
"ascertained in and by the following statement:
Our Invention is an instrument for stretching or straining paper or other flexible
material for use for Photographic or other purposes, perfectly flat & even.
It is designed primally for straining paper, gelatine films or other flexible materials
tised as supports for sensitive emulsion for the making of photographic negatives.
And it then, when charged with such flexible material, occupies the same position
in an ordinary Photographic Dark Slide for exposure as a glass plate would.
But it may also be used in enlarging from Photographic Films, and for many
general purposes such as straining prints, straining flexible materials while drying
and various other uses.
It consists of an instrument formed of a rectangular framework of metal or any
suitable substance. It is so designed as in one movement to grip the borders of the
paper or other flexible material to be strained and stretch it from all four sides in a
perfectly even surface, and with the same movement to press it up to the required
plane.
On each of the sides of the Frame A is hinged a strip of hard metal B slightly
wider than the framework. The outside edge of each strip and the inside edge of the
framework is turned up to form a rim C and is so arranged that when the hinged
strips are closed down on their hinges the top rims fit tightly or snap over the rims of
the framework beneath.
The hinged strips are ridged, indented or corrugated so that the ridges, indents or
corrugations project from their underneath surfaces and on closing them on to the
framework fit into the indentations provided in it to receive them immediately before
the edges of their rims completely overlap. Instead of the ridges, indents or cor-
rugations above described a series of holes D may be conveniently substituted drilled
through the hinged strips in such a manner as to leave a burred or projecting rim
round the edges of the punctured holes on the inner surface of the hinged strips. In
the framework corresponding holes are drilled E slightly larger into which the pro-
jecting burr of the punctures on the hinged strip fits.
For straining paper or other flexible material by this device, we open the hinged
strips B at right angles to the framework. We place in position in the frame thus
formed a sheet of paper or other flexible material of a size to fit it loosely. We then
close down lightly the hinged strips on to the paper or other material to be strained

page_text: and then place a level board, or anything possessing a flat level surface large enough
to cover the whole of the stretcher, upon the closed down hinged strips and then exert
a pressure it sufficient to press their rimmed edges over those of the framework
beneath. The
paper or other flexible material will then be found to be perfectly
strained and to present an even flat surface.
The object of the ridges, indents or corrugations or of the burred edged holes Don
the hinged strips, is to maintain the paper or other flexible material in its proper
position when straining. On shutting the hinged strip down on the framework these
projections come first in contact with the paper and jamming it into the receptacles
beneath, hold it in position and prevents it from slipping or being displaced when
pushed forward and strained by the pressure of the rims of the hinged strips. Upon
the rims of the strips being snapped simultaneously over those of the framework the
paper is pressed forward and strained from all sides. For Photographic purposes the
rims of the hinged strips is made so much deeper than those of the framework as is
necessary in order to press the paper forward until it lies in the same plane as the
underneath surface of the framework.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed we declare that what we claim is
1. The complete method of straining paper or other flexible material as above
fully described.
2. The form and construction of the instrument as above described and as shewn in
the drawings herewith.
WILLIAM THOMAS MORGAN.
ROBERT LEAMON KIDD.