Improvements in Envelopes.
Year: 1889

page_text: Date of Application, 6th Dec., 1889
Complete Specification Left, 18th Aug., 1890-Accepted, 11th Oct., 1890
PROVISIONAL SPECIFICATION.
Improvements in Envelopes.
We, FRIEDRICH POLLAK, and ALOIS POLLAK, both of 13 Myrthengasse, Vienna,
VII, in the Austrian Empire, Manufacturers of paper articles, do hereby declare the
nature of this invention to be as follows :-
This invention relates to paper envelopes, and has for object to so form or prepare
them that, although they are adapted to be closed in the usual simple manner by
cementing or gumming the upper flap to the rest, it is impossible to fraudulently
open the envelope without rending it.
For this purpose according to this invention, the overlapping portion of the upper
flap of the envelope is provided with numerous perforations, which may be made
before or after gumming the said portion. Instead of making the perforations in the
overlapping margin of the upper flap, they may be made in the portions of the
lateral flaps, to which the overlapping flap is cemented. In either case, the narrow
strips of paper remaining between the perforations will be torn, when an attempt is
made to open the envelope in a surreptitious manner.
For better security, the perforated portion of the upper flap of the envelope
may be painted over with a colour that will be wiped away or removed when
moistened.
Tinted this 6th day of December 1980
F. POLLAK,
Per L. W.
A. POLLAK,
Per L. W.
COMPLETE SPECIFICATION.
Improvements in Envelopes.
We, FRIEDRICH POLLAK and ALOIS POLLAK, both of 13, Myrthengasse, Vienna,
VII, in the Austrian Empire, Manufacturers of paper articles, 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 paper envelopes, and has for its object so to form or
prepare them that, whilst adapted to be closed in the usual simple manner by cement-
ing or gumming the upper flap to the rest, it shall be impossible to fraudulently open
the envelope without rending it.
For this purpose, according to this invention, either of the two overlapping portions
of the envelope is provided with numerous perforations.
In the annexed sheet of drawings,
Fig. 1 shows a paper blank for making up into an envelope and provided with
perforations such as referred to, and
Fig. 2 is an underside view of the completed envelope.
In the drawings, the perforations a are shown in the gummed margin d of the flap b
intended to be moistened and folded against the rest for closing the envelope, but the
said perforations may equally well be formed in the portions g of the lateral flaps cc
against which the gummed margin of the flap b folds. In either case, the narrow strips f
of paper remaining between the perforations a will be torn, when an attempt is made
to open the envelope in a surreptitious manner.
In Fig. 1, the gummed marginal portion d of the flap
portions 9 g of the flaps c c are indicated by hatchings.
and the corresponding

page_text: It will be readily understood that the perforations a may be made before or after
gumming.
For better security, the perforated portion of the upper flap of the envelope may
be painted over with an easily soluble colour that will be wiped away or removed
when moistened.
Having now particularly described and ascertained the nature of the said inven
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. A paper envelope having either of the two portions, that are gummed or fastened
together on closing the envelope, provided with numerous perforations, substantially
as and for the purpose described.
2. A paper envelope, in which the upper flap has its gummed marginal; portion
provided with numerous perforations and on the outside coated over with an easily
soluble colour, substantially as and for the purpose set forth.
53333
wo way of August 1890.
F. POLLAK,
Per L. W. by F. B.
A. POLLAK,
By L. W. per F. B.
F. POLLAK,
Per L. W. by F. B.
A. POLLAK,
By L. W. per F. B.