Improvements in Envelopes.
Year: 1892

page_text: Date of Application, 11th Apr., 1892
Complete Specification Left, 24th May, 1892-Accepted, 9th July, 1892.
PROVISIONAL SPECIFICATION.
Improvements in Envelopes.
l; ENGELBERT WILHELM SCHMITZ of Annenstrasse 48, Berlin, Germany, do
hereby declare the nature of this invention to be as follows
This invention relates to improvements in envelopes the object being to provide
an envelope which cannot be opened and shut again without leaving traces of these
manipulations.
Envelopes according to this invention are represented in the accompanying
drawings.
Referring to Figs. 1 to 5 inclusive the envelope comprises a middle part a
provided with four flaps b, c, d, e as shewn in Fig. 1. The flap d is formed with
slits, h, and i. The flap b may also be formed with slits such as f and 9, and the
flap e with a cut such as k. The sticking surfaces are shewn hatched.
To shut the envelope it is folded as shewn in Figs. 2 and 3. The flap m is
then lifted as shewn in Figs. 4 and 44 and stuck down firmly as shewn in
Fig. 5.
This envelope offers considerable security, as the portions of the flap 6 (Fig. 2)
lie underneath the flap c and portion e above it. The portions n and o of the
flap d lie underneath the flap e and the portion m above it, and finally the portion m
covers the cut k. It follows from the above described arrangement that when
opening the envelope, the narrow flaps will become torn, and on shutting it again,
the flap m will no longer be in congruity with the cut k.
Fig. 6 shews an envelope with inner and outer flaps but without a cut k.
Fig. 7 one with outer flaps only and with a cut "";
Fig. 8 one with outer flaps only and without a cut "k."
E. W. SCHMITZ,
By L. W., per F. B.
COMPLETE SPECIFICATION.
Improvements in Envelopes.
I, ENGELBERT WILHELM SCHMITZ of Annenstrasse 48, Berlin, Germany, 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 envelopes the object being to provide
an envelope which cannot be opened and shut again without leaving traces of these
manipulations.
Envelopes according to this invention are represented in the drawings filed with
my Provisional Specification.
Referring to Figs. 1 to 5 inclusive the envelope comprises a middle part a
provided with four flaps b, c, d, e as shewn in Fig. 1 the flap d being formed with
slits h and i. The flap b may also be formed with slits such as fand and the
flap e with an opening such as k. The sticking surfaces are shewn hatched.
To shut the envelope it is folded as shown in Figs. 2 and 3. The flap m is
then lifted as shewn in Figs. 4 and 4ª and stuck down firmly as shewn in
Fig. 5.
This envelope offers considerable security, as portions of the flap 6 (Fig. 2) lie
underneath the flap and a portion of the flap e above it while portions n and o
Pine R

page_text: of the flap d lie underneath the flap and the portion m above it, the portion m
finally covering the cut k. It follows from the above described arrangement that
when opening the envelope, the narrow flaps will become torn, and on shutting it
again, the flap m will no longer be in conformity with the cut k.
Fig. 6 shews an envelope with inner and outer flaps but without a cut k.
Fig. 7 one with outer flaps only and with a cut k;
Fig. 8 one with outer flaps only and without a cut k.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what ]
claim is :-
Envelopes constructed substantially as described with reference to and shewn in
Figs. 1 to 5 inclusive; in Fig. 6; in Fig. 7; and in Fig. 8 of the drawings.
*Dated this 24th day of May 1892.
E. W. SCHMITZ,
By L. W., per F. B.