Improvements in Means for Preparing Printing Surfaces, Name Plates, and the like.
Year: 1892

page_text: Date of Application, 13th Jan., 1892
Complete Spécification Left, 13th Oct., 1892-Accepted, 31st Dec., 1892
PROVISIONAL SPECIFICATION.
Improvements in Means for Preparing Printing Surfaces, Name
Plates, and the like.
1, JOHN JOFEH, of 40 Walden Street, Commercial Road, London, E.
Draughtsman do hereby declare the nature of my said invention to be as
follows
--
The object of my invention is to effect improvements in photo-mechanical
printing and other allied processes, for the purpose of reducing the cost; more
especially, but not exclusively, applicable to the production of printing surfaces
for letters, numerals, border lines, and other plain or ornamental designs.
In carrying out my invention, I take a plate of any suitable metal, a lithographic
stone, or a sheet of lithographic paper (all hereinafter referred to as the "plate")
of the required dimensions, and having one of its surfaces coated with a sensitive
solution or film.
The letters, numerals, border lines, and other plain or ornamental designs are
cut or stamped out of any suitable opaque materials, which are then laid upon or
attached to the plate, in their proper positions, whereby the light is excluded from
the plate as required. The remainder of the surface is then exposed to the light
and treated in the usual manner. The plate may be further operated upon by
chemicals so as to produce the necessary depth of engraving; the plate being then
used for printing, as usual.
My invention is also applicable to the production of metallic shop plates, and
other descriptions of plates requiring to have raised or sunken surfaces formed
thereon.
Dated 12th January 180°
GEO.
DOWNING,
8, Quality Court, London, W.C., Agent.
COMPLETE SPECIFICATION.
Improvements in Means for Preparing Printing Surfaces, Name
Plates, and the like.
I, JOHN JOFEH, of 40 Walden Street, Commercial Road, London, E.,
Draughtsman, do hereby declare the nature of my said 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 effect improvements in photo-mechanical
printing, and other allied processes, for the purpose of reducing the cost; more
especially, (but not exclusively) applicable to the production of printing surfaces
for letters, numerals, border lines, and other plain or ornamental designs.
In carrying out my invention, I take a plate of any suitable metal: a lithographic
stone or a sheet of photo-lithographic paper (all herein after referred to as the
plate") of the required dimensions, and having one of its surfaces coated with a
solution of bitumen, albumen, or other well known sensitive solution, or film.
The letters, numerals, border lines, and other plain or ornamental designs are cut
or stamped out of any suitable opaque materials, which are then laid upon or
attached to the plate, in their proper positions, whereby the light is excluded from
the plate as required. The remainder of the surface is then exposed to the light
and treated in the usual manner. The plate (except when paper is used) is then
operated upon by acids so as to produce the necessary depth of engraving; for
[Price 8d.]

page_text: which purpose I prefer to use nitric or muriatic acids; but other suitable acids or
mixtures of acids may be used. After operating by the acids the film is washed
off, and the plate is finished in the usual manner.
One method of using photo-lithographic paper consists in soaking the same in a
solution of bichromate of ammonium water, and alcohol. When dry, I space the
letters out on the coated side of the paper, and expose it to the light, After the
exposure it is rolled up with lithographic transfer ink, then washed and transferred
to the stone in the usual manner.
My invention is also applicable to the production of metallic shop plates, and
other descriptions of plates requiring to have raised or sunken surfaces formed
thereon.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
1. The method of and means and appliances for manipulating "plates" for
printing, substantially as herein before described.
2. The method of and means and appliances for manipulating name plates,
substantially as herein before described.
3. The improvements in means for preparing printing surfaces, name plates, and
the like, substantially as herein before described.
Dated 13th October 1892.
GEO.
DOWNING,
8, Quality Court, London, W.C., Agent.