Year: 1897

page_text: I, WILLIAM HENRY DORMAN, of the Green Hall, Stafford, Engineer, do hereby
declare the nature of this invention to be as follows:
The object of this invention is to construct cutting presses so that they may be
operated by hydraulic pressure.
The press is constructed with a rising and falling bed or platen either being
operated by a hydraulic cylinder and ram.
If the platen is made to rise and fall it may do so through an unvarying distance
determined by a constant stroke of the hydraulic ram and the bed may be adjust-
able up and down to suit various heights of knife and thicknesses of cutting
block or the bed may move up and down and the platen be adjustable.
If desired the stroke of the hydraulic ram may be made capable of adjustment
both upwards and downwards by providing adjustable stops to limit its movement..
One or more hydraulic presses may be employed and if more than one they
may be arranged to act either together or independently.
Dated this ocu 1.
(*
+3 100%
I, WILLIAM HENRY DORMAN, of the Green Hall, Stafford, 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:-
The object of this invention is to construct cutting presses so that they may be
operated by hydraulic pressure.
The press is constructed with a rising and falling bed or platen either being
operated by a hydraulic cylinder and ram.
If the platen is made to rise and fall it may do so through an unvarying distance
determined by a constant stroke of the hydraulic ram and the bed may be adjust-
able up and down to suit various heights of knife and thicknesses of cutting
block or the bed may move up and down and the platen be adjustable.
If desired the stroke of the hydraulic ram may be made capable of adjustment
both upwards and downwards by providing adjustable stops to limit its movement.
One or more hydraulic presses may be employed and if more than one they
may be arranged to act either together or independently.
CD 077

page_text: The knives are loose and cut upon a block of wood or other suitable material.
My invention is illustrated by the accompanying drawings in which:
Fig. 1 is a front elevation, partly in section, of one form of my improved
press.
Fig. 2 is an end view of the same.
Figs. 3 and 4 shew an alternative construction.
Fig. 5 is a modified detail.
In Figs. 1 and 2 a is the main. bed of the machine supported upon the
stools a¹ a² and having four tie rods a³ a³ ³ suporting the top beam a¹.
The hydraulic cylinders (in this case two) b' are carried in the bed a and
are provided with rams and stop covers 64 65.
The rising and falling beds 66 6 are supported on the rams 62 63 and carry
the cutting blocks cc, hides and knives.
The platens d d are adjustable up and down by their screws d³ to suit
variations in the thickness of the blocks c c and depths of the knives c4 c³.
The valves e c¹ (which may be of similar construction to those described in a
former specification of Letters Patent granted to me No. 8728, A.D. 1896) admit
water by the pipes e²e for the purpose of raising the rams 62 63 and discharge
by the pipes ee so as to allow the rams b2b to descend.
In Figs. 3 and 4 the frame f carries a double acting cylinder f¹ and ram f which
latter with the platen f³ rises and falls through an unvarying distance by the
operation of the inlet valves g g' and outlet valves g² g³. (These valves may, if
desired, be arranged differently and connected together as illustrated, for instance,
in my prior Specification No. 9473 A.D. 1896).
The bed his formed in two parts 2 and is furnished with inclines h³ h
by which, on imparting a horizontal movement to the upper bed h¹ by means of the
screw, the total depth of the bed may be varied to accommodate variations in
the thickness of the outting block i or depth of the knife .
Fig. 5 shews a ram j provided with a stem j and furnished with adjustable
locking nuts which take against the bottom of the cylinder, and
limit the upward movement of the ram j. The downward movement is limited
by the adjusting screw k carried by the inverted bridge which is attached to
the cylinder. "These rams j would be opposed by upper fixed platens in place of
the adjustable ones d . I do not confine myself to the exact constructions
herein described and illustrated as other arrangements will naturally suggest
themselves.
Having now particularly described and ascertained the nature of my said in-
vention, and in what manner the same is to be performed, I declare that what I
claim is:
In a cutting press of the kind described, in which loose knives and a cutting
block are employed, the use of one or more hydraulic cylinders and rams for the
purpose of obtaining the pressure required.