Year: 1886

page_text: Date of Application, 1st Nov., 1886.
Complete Left, 30th July, 1887.
Complete Accepted, 30th Aug., 1887.
DANIEL THOMAS POWELL of 33A Ludgate Hill in the City of London, Printers'
Engineer do hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in cylinder printing machines and has for
its object the simplification of the method of operating the type-bed and also of
enabling the machine to be driven at a higher rate of speed than has been heretofore
attainable.
It is as well to state at the outset that I dispense with all the ordinary well known
means of operating the type-bed, there are no ribs or rails, and wheels and racks and
jointed rocking levers, are not employed.
The type bed is placed at the top of a quadrant and is a flat planed surface.
The quadrant has its axis in bearings at the bottom of the side frames and being of
sufficient length does not loose its balance when rocked to and fro, consequently it may
be operated at a very great speed without jar or vibration.
The quadrant (with the type bed and ink table) is rocked to and fro by a
connecting rod worked from a crank pin in a spur wheel in the ordinary well known
manner.
The type bed describes in its oscillation a portion of a circle and being flat it is
necessary that the cylinder should rise and fall. To acquire this motion I place on
the cylinder shaft, at either side of, and the same size as the cylinder two wheels which
run on type high bearers attached to the type bed. The object of these wheels is to
keep the cylinder always at a proper distance from the table and to allow the type bed
to return after printing while the cylinder stops.
The cylinder shaft bearings are suitably accommodated with spring adjustments to
admit of the rise and fall of the cylinder the impression being given by the energy of
the springs.
Another method is to make cambs or shapes which cause the cylinder to rise and
fall and thus give an impression.
The ink table may be either flat and set at an angle or curved.
The frame is of a circular shape corresponding to the radius of the quadrant.
This arrangement is equally applicable to single or two feeder machines.
L
what 1986

page_text: I DANIEL THOMAS POWELL of 33A Ludgate Hill in the City of London, Printers'
Engineer 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:-
This invention relates to improvements in cylinder Printing machines and has for
its object the simplification of the method of operating the type bed and also of
enabling the machine to be driven at a higher rate of speed than has been heretofore
attainable.
In order that my invention may be better understood I have annexed hereto a sheet
of drawings with indicating letters to point out the various parts and in both the
figures the same letters indicate like parts.
Fig. 1 is a side elevation showing a general view of the whole machine.
Fig. 2 is a detail of the type bed-rocking quadrant, and impression arrangements.
The type bed A a flat planed surface is placed at the top of the rocking quadrant B
which has its bearings at the bottom of the side frame.
C. This quadrant is rocked to and fro by a connecting rod worked from a crank-
pin in a spur wheel in the ordinary well known manner.
Dis the printing cylinder having its axis in the bearings E which are attached to
the rod F working through the bearings in the side frame G & G¹.
Fixed to this rod F is the impression block H and this is held in position by check
nuts at top and bottom. The impression block H carries on its stud pin a friction
wheel J which works against the shape K attached to the under-side of the type
bed A.
The motion is imparted to the cylinder by the well known means of a rack and
wheel as shown at L. L'. It will be seen that this rack is curved at either end and is
straight in the middle. M is the ink table which may be flat or curved at option.
When the type bed is made to move from end to end the cylinder must be made to
rise and fall to suit the varying angle of the flat type bed and this is provided for by
the shape or camb K. The impression is imparted to the type by means of the friction
wheel the amount of pressure being regulated by the adjustment of the impression
block H with its check nuts.
Another method is to construct the cylinder of such an eccentric form as to cause
it to bear evenly on the type on the flat type bed without any rising and falling of the
cylinder bearings or, if plates are used, instead of moveable types and bent to the
proper curve, the rising & falling of the cylinder will be obviated and it may be a true
circle instead of eccentric and the shape and friction wheel dispensed with.

page_text: 66
Fig. 1 shows a general view of the machine and includes the driving inking and
taking off" arrangements these being similar to the methods now in use do not form
any part of the present invention.
This invention is equally applicable to single or two feeder machines.
Having now described the nature of my invention and disclosed the method of its
working, be it known that what I consider novel and claim as my invention is as
follows
1. The introduction, adaptation, and use of a type bed either flat or curved mounted
on the top of a rocking frame or quadrant substantially as described.
2. The employment of an eccentric impression cylinder, or the curved rack, shape
and friction wheel with the impression block substantially as described.