Improvements in Envelope Gumming Machines.
Year: 1898

page_text: Date of Application, 23rd Mar., 1898-Accepted, 28th May, 1898
COMPLETE SPECIFICATION.
Improvements in Envelope Gumming Machines.
I, ROBERT ERNST FISCHER, of 3, Wertherhofstrasse, Barmen, Rhenish Prussia,
Germany, Manufacturer, 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 invention has reference to machines for gumming envelope blanks and the like
and has for its object to provide such a machine in which are combined simplicity of
construction and effectiveness in operation and which will overcome the many
disadvantages due to the use of the existing machines and increase the capacity.
The invention consists of a mechanisin for separating the envelope blanks
individually from the stack and its general improvement consists in the arrangement
of a pair of rotating brushes adapted to strike the pile of blanks and preventing the
upwards crease of the flap edges of single envelopes. The invention will hereinafter
fully and clearly appear from a reading of the following description taken in
connection with the accompanying drawing in which
Figure 1 illustrates the separating mechanism in a vertical section.
Figure 2 a plan view thereof.
Figure 3 is a skeleton figure showing a modification of the device.
The
The same numeral of reference denote the same parts in the drawing.
reference numerals a, b denote the blank receiving rollers before which on suitable
supporting stays is located the stay of envelope blanks c.
Above the roller b is mounted in bearings a bar d on which are adjustable fixed
brackets e that carry slotted bars f. To these bars are pivotted the angle standards g
each of them is fitted with a gage h which thus may be adjusted in forward,
backward and lateral direction to the size of the blanks, which serve to retain the
blanks in position on the supporting table or bars together with the front
gages that are also adjustable. Underneath the stack is mounted the roller i which
strikes against the blanks in order to separate them individually from the pile and
that this operation may be properly carried out I provide the rear gages h at their
lower ends with an elastic materials as india rubber or the like so that the striking
of the roller cannot produce a creasing of the flaps edges of the thin sheets which
But in order that this
would cause a disturbance in the working of the machine.
cannot take place I arrange between the blank receiving rollers a b and the pile a
pair of brushes l. These brushes are fixed to a shaft m which is rotated by cord
gear in the direction of the arrow. The brushes are thus caused to strike the pile
surface from above to below so that it is impossible for a single blank to slip
forwards and its flaps may be creased upwards.
Instead of rotating brushes can use also an ascending and descending one as
it is shown in the skeleton figure 3. The pile n will be struck by the brush o
which is fitted to a rack p guided in suitable bearings q. A pinion r meshing with
the rack imparts to the brush the vertical movement.
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 :-
In a mucilating machine for envelope blanks or the like the arrangement and

page_text: use of a pair of rotating or as and descending brushes being lodged between the
blank receiving rollers and the stack which are adapted to strike the rear stack
surface and prevent slipping forwards of single blanks and the creasing upwards of
their flap edges in order to properly convey the blank to the receiving rollers and to
the mucilage fountain as illustrated and for the purpose set forth.
Dated this 10th day of March 1898