Improvements in Apparatus for Clamping or Securing Paper or other Materials while being Cut, Especially Applicable to Envelope Cutters.
Year: 1890

page_text: COMPLETE SPECIFICATION.
Improvements in Apparatus for Clamping or Securing Paper or
other Materials while being Cut, Especially Applicable to Envelope
Cutters.
THOMAS BENJAMIN BACON, CHARLES MORGAN, both of Tabernacle Street Finsbury
in the County of Middlesex, Envelope makers, 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 has for its object improvements on a former invention, for which
Letters Patent were applied for on November 1st, 1889, such application being
numbered, 17361.
Now according to this Invention, instead of fastening the indiarubber balls to the
top and bottom plates, we secure the said balls to one plate only, preferably the top
one, or make use of loose balls and provide a means whereby the said plates may be
secured to each other, so as to prevent the bottom plate from falling out of the cutter
when the latter is lifted, and also a means whereby the distance between the two
plates may be adjusted to suit the requirements of the work in hand or when the
cutter is sharpened.
In the accompanying drawing, Figure 1 represents section through a cutter fitted
with the improved apparatus, constructed according to this invention.
Figure 2 is plan of same.
Figure 3 is plan of bottom plate.
Same letters denote same parts in all the Figures. a is the cutter, 6 the top plate,
e bottom plate, de screws for securing top plate to the cutter a, f, g, h, i are the
indiarubber balls, f¹ g¹ h¹¹ are cups attached to the top and bottom plates to receive
the same and prevent them from moving. By using loose balls much time is saved
in attaching the apparatus to a newly ground cutter or when changing cutters. To
adjust the distance between the top and bottom plates, and to prevent the lower plate
from leaving the cutter when the latter is lifted, we secure the two plates together
by means of the telescopic stud or pin k, shewn on the right hand side of Figure 1,
the adjustment being made by means of the screwed nuts 1, the upper portion k¹ of
the pins or studs & being screwed to fit the same, or we may use a strap of leather m,
or other suitable material secured to the bottom plate c by a screw n or other suitable
means and secured to the top plate b by means of a screw o, the portion m¹ of the
strap m being slotted to allow of the necessary adjustment, as shewn on the left hand
side of Figure 1.
Instead of using indiarubber balls we may use indiarubber cups of hemispherical or
other suitable shape.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed we declare that what
we claim is :-
1. In an apparatus for clamping or securing paper or other materials while being
cut, the use of loose indiarubber balls and cups substantially as described and
shewn.
11. In an apparatus for clamping or securing paper or other material while being
cut, the use of indiarubber cups substantially as described.

page_text: III. In an apparatus for clamping or securing paper or other material while being
cut, the use of the telescopic pin or stud shewn in figure 1 substantially as described
for the purposes specified.
IV. In an apparatus for clamping or securing paper or other material while being
cut, the slotted strap substantially as described for the purposes specified..
Dated this 17th day of January 1890.
ERNEST SALAMAN,
65 & 66, Chancery Lane, London, Agent for Applicants.