Improvements in Lithographic and other Printing Machines.
Year: 1889

page_text: Date of Application, 28th Jan., 1889
Complete Specification Left, 15th Oct., 1889-Accepted, 14th Dec., 1889
PROVISIONAL SPECIFICATION.
Improvements in Lithographic and other Printing Machines.
WILLIAM ROUSE 5 Waverley Terrace Goldsmith Street Nottingham Lithographic
Printer do hereby declare the nature of this invention to be as follows:-
This Patent consists of two or more rollers or wheels of such a shape and placed at
such angles, that when placed in a line at opposite sides of the face of the cylinder,
and brought to hear against it while revolving, the inclination of the rollers or wheels
will be to travel in a slanting direction towards the centre of the cylinder. Such
inclination, however, being checked by their working in stationary bearings, allowing
of no lateral play, causes the rollers to pull the paper towards the edges of the
cylinder, keeping it in a state of tension and preventing creasing while printing.
A cylindrical roller, which works parallel with the cylinder, is placed in the centre,
which guides and holds the material in its proper place, and counteracts any unequal
pulling which might occur in a lateral direction.
The arrangement for adjusting the rollers to the cylinder is as follows
:―
A flat bar of convenient length is placed parallel with the cylinder in front and as
low down as possible. On the upper face of the bar is an inverted groove which
runs from end to end, which admits and holds the heads of screws which can be
moved to any part of the bar. Metallic plates, with elongated slots are fitted over
the screws in the bar and by the aid of nuts and washers any elevation or lateral
motion may be got. Each roller or wheel has its bearings in spring clips attached
to the end of the plates.
The rollers may be of any convenient size and shape, the side rollers used for the
tension preferably conical, the one used in the centre for guiding and holding
the material being cylindrical.
These rollers may be made of, or covered with any suitable material preferably a
metal core covered with Indiarubber.
The arrangement of these rollers in working is as follows:-
For first or single printing where extra tension is required one or more of the
conical rollers are placed on each side of a centre roller in line with it and their
taper ends towards it, the taper ends being elevated sufficiently to ensure perfect
contact with the cylinder.
For after printing where less tension is required or where the rollers are apt to
smear should the last printing not be sufficiently dry the two end rollers or wheels
only need be used. These must be lifted out of their clip bearings and reversed, their
base ends being now towards each other. These ends are set back as far under the
cylinder as convenient the taper ends being dropped vertically until the edges only of
their bases are in contact with the cylinder. They then act the same as a pair of
narrow wheels with their axles inclined towards the centre of the cylinder which
allows of their being worked at the extreme edges of the material thereby escaping
the printed matter.
The bar with the plates and rollers attached is elevated and dropped automatically.
Dated this 50th day of Lan1980
COMPLETE SPECIFICATION.
Improvements in Lithographic and other Printing Machines.
WILLIAM ROUSE 5 Waverley Terrace Goldsmith Street Nottingham Lithographic
Printer, do hereby declare the nature of this invention and in what manner the same
[Price 6d l

page_text: is to be performed, to be particularly described and ascertained in and by the
following statement :-
This Patent consists of two or more rollers or wheels of such a shape and placed at
such angles that when placed in line at opposite sides of the face of the cylinder and
brought to bear against it while revolving the inclination of the rollers or wheels
will be to travel in a slanting direction towards the centre of the cylinder. Such
inclination however being checked by their working in stationary bearings allowing
of no lateral play causes the rollers to pull the paper towards the edges of the
cylinder keeping it in a state of tension and proventing creasing while printing. And
in order that the said invention and the manner of performing the same may be
properly understood I proceed to describe the same with the aid of the accompanying
sheet of explanatory drawings.
In the said drawings the same numerals are used for the same or like parts
throughout.
Figure 1 on the accompanying sheet of drawings shews the arrangement of this
improved PP at this apparatus to work the bar (2) is fitted by means of screws and
nuts or other convenient attachment to the printing machine which may be of any
modern construction. The sliding plates (3) are then attached to the bar by means of
Theaded nuts (4) which pass down the slot (5) in the bar, the said slot passing down
the whole length of the bar allows the plates to be placed in any position according to
the width of the paper to be printed.
The taper cones (6) are then placed in the spring bearings (7) with their taper
ends towards each other or at an angle to increase tension if required.
The slots (8) in the plates (3) are to admit of the said rollers being set at the
desired angles.
The screws and nuts (9) are for the purpose of holding a central cylindrical roller
which counteracts any unequal pulling by the side rollers when this is necessary.
The bar (2) is then placed in bearings which fit both ends of the bar the said
bearings being connected with an ordinary cam-motion connected to the printing
machine.
The machine now being set in motion causes the said bar with the rollers attached
to be pressed upon the paper at each revolution of the cylinder of the printing
machine.
The action of the said rollers upon the paper being printed will be to keep it in a
state of continuous tension.
In cases where a second process is required before the first is dry, the two end
rollers may be elevated and their inner ends lowered thus allowing only their edges
to come in contact with the outer edges of the paper being printed. In this case the
centre roller must be lowered to avoid the printed matter, the outer rollers thus acting
like a pair of narrow wheels.
The rollers or wheels may be made to any convenient size and made of and covered
with any suitable material, or may be inset with bristles or wire in brush form.
Fig. 2 in the accompanying sheet of drawings is an end elevation of Fig. 1.
Having now particularly described and ascertained the nature of my said Inven-
tion and in what manner the same is to be performed I declare that what I
claim is
I. The use of parallel or conical rollers or wheel in a straight line or at angles to
tlie cylinder of the printing machine for the purpose hereinbefore described.
II. The use of adjustable bearings as herein described for the purpose of setting the
rollers at any angle required.
יהוי ב
H. F. HILL,
Agent.