An Improvement in the Production of Names, Titles, and other Inscriptions on Photographic Prints, Transparencies, and Lantern Slides.
Year: 1892

page_text: Date of Application, 8th Nov., 1892
Complete Specification Left, 21st Feb., 1893-Accepted, 25th Mar., 1893
PROVISIONAL SPECIFICATION.
An Improvement in the Production of Names, Titles, and other
Inscriptions on Photographic Prints, Transparencies, and Lantern
Slides.
I, ADAM GRAY of 142, Mercers' Road, Tufnell Park, London, Rubber Stamp
Maker, do hereby declare the nature of this invention to be as follows:-
Heretofore the production of names, titles, numbers, or other inscriptions, upon
photographic prints has been effected by writing; painting, or printing, in reversed
characters and with special type on the photographic negative itself, which is a
difficult operation requiring special skill and is frequently unsatisfactory.
The object of my invention is to enable such names or other inscriptions to be
produced from ordinary type so that in printing from the negative the name, or
other matter in question, will appear in clear sharp white characters upon the
photographic print as a ground without necessitating any retouching of the negative
or of the photographic print, transparency, or lantern slide.
The invention consists in printing a transfer of the name, title, number, or other
matter, from metal type and with transfer ink such as is used in lithography upon
gummed or otherwise prepared paper, transferring the printed matter to the photo-
graphic negative and then applying charcoal bronze or other powder to the
characters so transferred in order to render them opaque.
"
'The transfer may be effected by means of a scraper or other instrument by which
a uniform rubbing pressure may be applied to the back of the transfer print when
laid face downwards on the photographic negative.
In applying the invention to lantern slides, the transfer would be printed from
reversed type.
Dated this 8th day of November 1892.
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.
COMPLETE SPECIFICATION.
An Improvement in the Production of Names, Titles, and other
Inscriptions on Photographic Prints, Transparencies, and Lantern
Slides.
I, ADAM GRAY of 142, Mercers' Road, Tufnell Park, London, Rubber Stamp
Maker, 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 :-
Heretofore the production of names. titles, numbers, or other inscriptions, upon
photographic prints has been effected by writing, painting, or printing in reversed
characters on the photographic negative itself, which is a difficult operation
requiring special skill and is frequently unsatisfactory.
The object of my invention is to enable such names or other inscriptions to be
produced from ordinary type, so that in printing from the negative the name or
other matter in question will appear in clear sharp white characters upon the
photographic print as a ground without necessitating any retouching of the
negative, or of the photographic print, transparency, or lantern slide.
The invention consists in printing from metal or rubber type and with a fatty
or transfer ink, such as is used in lithography, the name, title, or other matter upon
..... 041

page_text: a gummed or otherwise prepared transfer paper and in transferring the impression
to the photographic negative in the following manner.
The part of the negative which is to receive the transferred impression must be
prepared by rubbing the unvarnished or varnished surface of the film with powdered
resin in the same way as for retouching, so as to give the surface a "tooth " to
enable it to retain the ink and present a sharp and well covered impression.
The transfer impression of which the ink is still moist is then to be laid face
downwards on the prepared surface of the negative and pressed into close contact
therewith, by rubbing the back of the transfer paper with a scraper or other
instrument by which a uniform rubbing pressure can be applied so as to cause the
impression to be transferred to the negative.
The transfer paper being then stripped off, charcoal bronze or other powder is
then to be applied to the transferred impression in order to render the characters
opaque, after which the negative should be varnished, whether previously varnished
or not.
The operation is the same for lantern slides as for negatives, except that whereas
for ordinary photographic negatives the type used in printing the transfers would
be similar to ordinary type, so that when the impression is transferred to the
negative the letters will be reversed whilst for lantern slides the type would be
reversed as regards direction so that when transferred to the lantern slide they
will be presented the right way for reading.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is―
The herein described method of producing names, titles, and other inscriptions,
which consists in printing a transfer on prepared paper, transferring the impression
to the previously-prepared surface of the photographic negative, transparency, or
lantern slide, and applying powder to the transferred impression, all substantially
as specified.
1000
Dated 21st February 1800.
A. GRAY,
By A. M. & Wm. Clark,
53, Chancery Lane, London, Chartered Patent Agents.