Printing Direct in Swift Running Rotary Web Printing Machines with Metal Engravings.
Year: 1886

page_text: Date of Application, 12th May., 1886.
Complete Left, 11th Feb., 1887.
Complete Accepted, 11th Mar., 1887.
Printing Direct in Swift Running Rotary Web Printing
Machines with Metal Engravings.
I, DAVID COUPER THOMSON of 34 North Lindsay Street Dundee Shipowner and
Newspaper Proprietor do hereby declare the nature of this invention to be as
follows:-
The object of this invention is to enable impressions to be taken direct from
engraved, etched, electro plates or other impressions in relief fixed capable of adjust-
nient to the Stereoplates of rotary web machines. I attain my object in this way;
I put a block of wood or metal type high not less than the length or breadth of
the printing surface in the type form in the required position of the printing surface
then take an impression from the form in papier maché and put the mould in the
Stereo casting box. Into this impression in the required position I insert the printing
surface, which I have previously curved to the same are as the stereoplates, with its
face to the mould. The melted Stereo composition is then poured into the casting box
but filling in behind the inserted printing surface forms a bed for it. The Stereo plate
thus cast along with the imbedded printing surface is now taken out of the casting
box and the latter secured in its place by bolts, nuts, solder, composition, screws or
nails and the whole put on the cylinder of the rotary web machine and printing from
same proceeded with. I give the requisite curvature to the printing surface with a
press having a curve with the same radius as that of the Stereoplates.
DAVID COUPER THOMSON.

page_text: '
Machines with Metal Engravings.
I, DAVID COUPER THOMSON, of 34 North Lindsay Street, Dundee, Shipowner and
Newspaper Proprietor, 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:-
The object of this Invention is to enable impressions to be taken direct from the
finest engraved, etched, electro plates or any other impressions, in relief fixed capable
of adjustment to the stereoplates of rotary web machines.
I attain my object by the following method:-I put a block of wood or metal type
height not less than the length or breadth of the printing surface, in the type form, in
the required position of the printing surface, then obtain an impression from the
pattern or form in papier maché, and fix the mould in the stereo casting box. Into
this impression in the required position I insert the printing surface which I have
previously curved to the are or radius as the stereoplates, with its face to the mould.
The melted stereo composition is then poured into the casting box, but filling in
behind the inserted printing surface forms a bed for it. Thus the stereo plate is cast
and accompanied by the imbedded printing surface, is now taken out of the casting
box, and the imbedded printing surface securely fastened in its position by bolts, nuts,
solder composition, screws or nails, and the whole being then put on the cylinder of
the rotary web machine, ready to proceed with the production of the printed copies.
The requisite curvature is formed by means of a press constructed with a curve or
radius same as that of the stereoplates.
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 combination of casting a recess in the stereoplate with the engraved or
electro plate itself, to allow the molten metal to run in the recess, mould, or casting
box, and when cool is removed from the mould and after a slight dressing is ready for
the printing machine, substantially herein described.
2. The combination of the method of inserting metal printing surfaces of varying
thicknesses in casts obtained by the papier mache process of stereotyping for printing
direct from the metal surface on the paper, the metal surfaces being adjusted to suit
the impression required, substantially herein described.
3. The combination of the metal surfaces being changed without injury to them-
selves or to the stereoplates and obviating fitting of the stereoplates for a rotary web
printing machine, substantially herein described.
HUGHES, ELI & HUGHES,
76, Chancery Lane, London, W.Ü.,
Agents for the Applicant.