An Appliance in Envelope-printing Presses, for Facilitating "the Feeding of Envelopes to the Printing Apparatus.
Year: 1890

page_text: COME LEIE DIMOIFICATION.
An Appliance in Envelope-printing Presses, for Facilitating "the
Feeding of Envelopes to the Printing Apparatus.
I, WILHELM HEIDELMANN of Hauffstrasse No. 3, Stuttgart, in the Empire of
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 :-
This invention relates to presses for imprinting envelopes and has for its purpose
to provide an attachment by means of which the envelopes to be printed are
automatically and securely supplied to the press.
Referring to the annexed drawing, in which like letters designate like or analogous
parts throughout the Figures, Figs. 1 and 2 are respectively side view and front view
of the improved appliance shown in the position occupies after an envelope has
been taken out of the block. Figs. 3 and 4 are the same views respectively in the
position prior to the seizing of the envelope. Figs. 5 and 6 represent details.
All apparatus hitherto known for automatically supplying envelopes to the printing
press are based on the principle of seizing the depending closing flap of the
envelope by means of suitable mechanism, drawing it out of the block and con-
veying it to the press. Not unfrequently the said closing flaps stick to the envelope
or the point of the open flap gets behind that of the closed flap; in either case the
open flap is prevented from dropping and consequently cannot be seized. Such
envelopes have to be pulled out of the block before the apparatus can continue its
work and considerable loss of time results.
By the improved appliance, which is intended to obviate the above inconvenience,
the envelope to be trented is supplied to the press in two stages in such a manner as
to cause it to be first advanced from out of the block a sufficient distance to ensure
its being subsequently seized by the arms ii of the press and moved along. The
mode of and apparatus for lifting each envelope out of the block constitutes my
invention here after described. Each single envelope is seized and advanced by
means of a lifting frame c adapted to be moved to and fro and provided on each.
side with a thin cheek d adjustable corresponding to the width of the envelope, said
cheeks being made in the shape illustrated by Fig. 6, that is to say having an
inclined cut on their inner sides where they are somewhat bent round and sharpened
in the manner of a knife. According as the one or the other longitudinal side of
the envelope is to be imprinted, these. knife-like inclined portions of the lifting
cheeks d enter between the envelope proper and the loose closing flap or between the
envelope and the closed flap which in most cases is not stuck fast on either side
for a distance of about 10-15 millimetres. This effect is produced by the cheeks on
the forward movement of the lifting frame c through crank sliding firmly along the
rear side of the envelope. The cheeks securely advance the envelope a sufficient
distance to allow it to be seized and conducted to the press by the reversers i i.
In order to prevent more than one envelope to be advanced at a time, two solid
holders g are provided in front on the lifting side. These holders are adjustable to
the thickness of the envelope so as to allow one envelope only to pass under the same,
while the rest are retained.
To reduce the friction of the envelope to be advanced, which is always the lowest,
on the table, a bar his provided at the front side thereof, on which the envelope
slides.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim, is :
In presses for imprinting envelones. for the
of producing
BurnORA
an automatio

page_text: f
and secure lifting of one envelope only at a time from out of the block and conducting
it securely to the press, an appliance or attachment characterised by a lifting frame c
having a reciprocating movement and being, provided with lifting cheeks d adjustable
corresponding to the various widths of envelopes, the bevelled or rounded off inner
corners of said cheeks. being somewhat bent up and sharpened in the manner of a knife
and adapted to securely enter, on the frame being moved forward, between the envelope
proper and the closing flap as far as the folds of the envelope, and advance the latter
for the requisit distance, in combination with the adjustable solid holders g serving
to obviate the seizing of more than one envelope at a time, substantially as illustrated
and described.
Dated thin 15th day of Mo 1800
WILHELM
HEIDELMANN.
By Huelser & Co.,
142, Fleet Street, London, Attorneys.