Improvements in Self-inking Lever Stamps.
Year: 1891

page_text: COMPLETE SPECIFICATION.
Improvements in Self-inking Lever Stamps.
I, CHARLES WRIGHT, of 23 Rahere Street, Goswell Road, London E.C., Die
Sinker, 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 self-inking lever stamps, such as are
principally used for stamping or printing the names and addresses of business firms
upon note-paper, envelopes and for similar purposes.
In order that my invention may be fully understood, I have hereto annexed a
sheet of drawings illustrative thereof, Fig. I being a side elevation of the com-
plete stamp and Fig. II a front elevation thereof.
In Fig. I the stamp is shown in a state of rest, but in Fig. II the lever has been
turned partially through its arc so as to bring the inking roller underneath the die.
The improved stamp as will be readily seen contains many of the parts usually
found in such apparatus. The die a to or upon which the type is fixed or cut is
attached to a plunger (6) which is raised or depressed upon the surface to be
printed upon by means of a cam (c) actuated by a lever c¹ the said cam and lever
being formed integral with each other and mounted fixedly upon a spindle or
shaft (d) which passes through the upper part of the barrel (d) the latter being
supported by the arm (e) fixed to the bed (e¹). It is usual however to form the
three parts (d), (e) and (e¹) in one casting, this construction being shown in the
drawing. As a means of inking the die (d), I employ a roller (f) mounted in
bearings (f) attached to rods (") which are capable of sliding through lugs f
formed on or attached to arms which are mounted on the end of the shaft (d).
Spiral springs (*) through which the rods (f) pass and to which they are
attached at their upper ends, permit the rods to slide in their bearings and thus
lengthen and shorten the radius described by the roller (f).
An inking table (g) is fixed to the arm (e) over which the roller (f) rides and
against which it rests, at the completion of each stroke of the press. Parallel
guides h are fixed to the sides of the barrel d' in order to ensure proper contact
between the die and inking roller, the springs f³ serving to keep the roller in
contact with the guides throughout the course of its travel beneath the same.
The impression plate j, is mounted upon adjusting screws (k) and is covered by
an elastic pad k', kept in place by clamps ("). The material to be printed upon
is passed between the plate () and the blades which prevent it from rising-up
and intercepting the printing roller in its passage across the die.
The action of the machine is substantially that of the ordinary lever stamp,
except that the lever o¹ has a much greater "sweep" or angular motion than usual,
in order that the printing roller may be perfectly clear of the die before the
cam (c) causes the latter to descend upon the material to be printed.
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:
1st. The combination with a lever stamp of an inking-roller f and inking-
table g substantially as and for the purpose herein described and illustrated in the
accompanying drawing.
2nd. In a lever stamp the inking roller mounted between extensible arms f*,
whereby the travel of the roller may be caused to conform to the contour of
guides substantially as herein described and illustrated in the accompanying
drawings.

page_text: 3rd. In a self-inking lever stamp the employment of the impression table (j)
mounted upon adjusting screws and provided with clamps substantially as
described and illustrated in the accompanying drawings.
4th. The improvement in self-inking lever stamps, substantially as described and
illustrated in the accompanying drawings.
Dated this 9th day of October 1891.
HUGHES, SON & Co.,
38, Chancery Lane, London, Agents for the Applicant.