Improvements in Envelopes.
Year: 1895

page_text: Date of Application, 21st Nov., 1895-Accepted, 21st Dec., 1895
Improvements in Envelopes.
I, WILLIAM DANIEL THOMAS, of 207 Wyckoff Avenue Brooklyn, in the
County of Kings, and State of New York, United States of America, Electrician,
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
Specification:
This invention relates to envelopes and to the manufacture thereof, and the
object of the invention is to provide an envelope, which having been once sealed
cannot be opened, without destroying the same, or leaving evidence of the fact
that it has been opened; and with this and other objects in view, the invention
consists in the construction, combination and arrangement of parts hereinafter
described and claimed.
The invention is fully disclosed in the following Specification, of which the
accompanying drawing forms a part, in which :-
Fig. 1, is a plan view of a blank from which my improved envelope is formed;
Fig. 2, a similar view with the end pieces folded;
Fig. 3, a back view of the envelope folded ready for use; and,
Fig. 4, a similar view of the envelope sealed; and,
Fig. 5, a section on the line 5—5.
In the practice of my invention, I cut from a sheet of paper of any desired style,
color and quality, the blank shown in Fig. 1, which comprises a front or body
portion A, a folding side or back B, folding end pieces C, and a folding flap D.
The side B, is provided with an extension b, which is adapted to be folded along
the dotted lines 61, and the outer side of the folding ends C, are gummed as shown
at C', Fig. 2, and the outer side of the extension b, of the side B, is also gummed
ns shown at 62, Fig. 2, and the inner side of the flap D, is gummed in the usual
manner as shown at d.
In preparing the envelope for use, the ends C, are folded over as shown in Fig. 2,
and the side B, is folded over said ends, and sealed thereto, and when the required
contents have been placed in the envelope and it is desired to seal the same, the
extension b, of the side B, is folded over the ends C, and over the contents of the
envelope, and sealed, to the body portion or front A, and the flap D, is then folded
over the side B, and sealed thereto, as shown in Fig. 4.
When thus constructed and sealed, my improved envelope cannot be opened,
without destroying the same, or tearing away parts thereof, the position of the
extension b, which is sealed to the body portion A, being such that moisture
cannot be applied thereto, and in order to open the envelope the flap D, must first
be removed, and the extension b, disengaged from the body portion A, and this
cannot be done, as hereinbefore stated, without destroying the envelope or tearing
off these parts, and it will thus be seen that I accomplish the object of my
invention, by means of the construction, which does not add materially to the cost
of the envelope, and which is well adapted to accomplish the results for which it is
intended.
Having fully described my invention, I claim and desire to secure by Letters
Patent :-
1. An envelope, composed of a blank, comprising a body portion, a folding side,
folding end nieces, and a flan, the said folding side being provided with a folding

page_text: extension, and said folding end pieces and said extensions, being gummed to their
outer surfaces, and said flap being gummed on its inner surface, substantially as
shown and described.
2. An envelope composed of a blank, comprising a body portion A, folding end
pieces as C, a folding side B, and a flap D, said side being provided with a folding
extension, and said ends and said extension being gummed on their outer surfaces,
the said flap being gummed on its inner surface, whereby the folding side may be
sealed to the inner surfaces of the body portion, substantially as shown and
described.
Dated this 17th day of November 1895.
WHEATLEY & MACKENZIE,
40 Chancery Lane, London, W.C., Agents.