Improvements in Envelopes.
Year: 1898

page_text: PROVISIONAL SPECIFICATION.
Improvements in Envelopes.
I, Madame LOUISE PLANCHE, née COSTE, of No. 83, Rue Vieille-du-Temple,
Paris, in the Republic of France, do hereby declare the nature of this invention
to be as follows:-
The envelopes hitherto generally employed and more particularly fancy
envelopes, have the great drawback of being transparent, and even the paper-
whether provided with printed patterns or "coated" the employment of which
has been attempted for the purpose of rendering the envelopes opaque, has
proved far from serviceable in practice, partly because of the complicated methods
of manufacture which it invoives, and partly on account of the danger to the
user's mouth, and to his health in general, incurred in moistening the sized or
coloured flap of the envelope preparatory to closing it.
Now the idea has occurred to me of lining the envelope, during the very
process of its manufacture, with a preferably coloured sheet, which, in the
finished envelope, forms an additional internal envelope or paper-bag, as it were,
into which a letter or card may be inserted without difficulty.
I thus obtain an envelope which is stiffened and made stronger by the lining
especially along its edges, whereas, in the case of sized or coated paper, the
sizing has the objectionable effect of making the paper heavy and liable to crack.
When the sheet of paper which is to form the envelope is cut to a suitable
shape or outline, a second sheet, coloured on one or both sides, is applied to the
first and fixed to its upper sides, only. The second sheet is cut so as to present
an outline which almost exactly corresponds to that of the first sheet or envelope
proper, leaving only the parts to be gummed or made adhesive, uncovered.
The two sheets together are then sent through the envelope-folding machine,
which folds them in the usual manner when the internal sheet will form a per-
fectly opaque inner envelope into which the enclosure (a letter or card) may be
readily inserted.
A modification of my lined envelopes, consists in combining, with the sheet
forming the envelope, a second sheet coloured either on one or both sides, and
made somewhat shorter than the finished envelope, its length being about double
the height of such envelope.
When the two sheets have been cut out to shape they are fixed together along
the folding line of the flap. The opaque sheet is folded along a line coinciding
to the bottom of the envelope and the two sheets are jointly sent
Then there will be formed a
through the envelope-folding machine.
species of paper-bag or portfolio closed below and open on the same side as the
envelope, into which the letter may readily be inserted by sliding it along the
sheet fixed to the envelope at the top.
The envelope thus folded will in all cases prove perfectly opaque, though the
paper used in making both the envelope proper and the lining may be as thin

page_text: as may be desired, which will permit the addition to the weight, arising from the
insertion of the opaque sheet, to be greatly reduced. The opaque sheet, though
it may be very thin, should however be very resistant.
These lined and perfectly opaque envelopes may assume any desired shape and
dimensions and may be made of any paper. The internal sheet, forming the
lining, should preferably be coloured on one or both sides, so that, though very
thin, it may be absolutely opaque.
T: 141 if a
1900
Improvements in Envelopes.
I, Madame LOUISE PLANCHE, COSTE, of No. 83, Rue Vieille-du-Temple,
Paris, in the Republic of France, 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:--
66
The envelopes generally employed, and more particularly fancy enve-
lopes, have the great drawback of being transparent, and even the paper
whether provided with printed patterns or coated "the employment of which
has been attempted for the purpose of rendering the envelopes opaque, has
proved far from serviceable in practice, partly because of the complicated methods
of manufacture which it involves, and partly on account of the danger to the
user's mouth, and to his health in general, incurred in moistening the sizes or
coloured flap of the envelope preparatory to closing it.
Now the idea has occurred to me of lining the envelope, during the very
process of its manufacture, with a-preferably coloured-sheet, which, in the
finished envelope, forms an additional internal envelope or paper-bag, as it were,
into which a letter or card may be inserted without difficulty.
I thus obtain an envelope which is stiffened and made stronger by the lining
especially along its edges, whereas, in the case of sized or coated paper, the
sizing has the objectionable effect of making the paper heavy and liable to crack.
In the accompanying drawings I have shown by way of example, my improved
lined envelope.
Figure 1 shows the envelope unfolded or spread out after the paper has been
cut to shape and the adhesive substance applied to it.
Figure 2 represents the lining cut to shape and unfolded.
Figure 3 shews the superposition of the envelope and lining, both being
unfolded.
Figure 4 represents the envelope and its lining folded into its final form, and
Figure 5 is a section taken upon the line 1-2 of Figure 4.
When the sheet of paper which is to form the envelope is cut to a suitable
shape or outline, (Figure 1) abcdefghij a second sheet, coloured on one or
both sides, is applied to the first and fixed by its two upper sides, kl and kr, only.
The second sheet is cut so as to present the outline klmnopqr represented in
Figure 2, which almost exactly corresponds to that of the first sheet or envelope
proper, leaving the parts s and t uncovered, these being the parts to be gummed
or made adhesive.
The two sheets together are then sent through the envelope-folding machine,
which folds them in the usual manner, when the internal sheet will form a per-

page_text: fectly opaque inner envelope into which the enclosure (a letter or card) may be
readily inserted.
The envelope thus folded will in all cases prove perfectly opaque, though the
paper used in making both the envelope proper and the lining may be as thin
as may be desired, which will permit the addition to the weight, arising from the
insertion of the opaque sheet, to be greatly reduced. The opaque sheet, though
it may be very thin, should however be very resistant.
These lined and perfectly opaque envelopes may be formed of any desired shape
and dimensions and may be made of any kind of paper. The internal sheet
forming the lining, should preferably be coloured on one or both sides, so that,
though very thin, it may be absolutely opaque.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what I
claim is
1. A lined opaque envelope, essentially constituted by an ordinary envelope
combined with an internal opaque sheet cut out to a suitable shape, that is to
say almost exactly similar to that of the envelope and stuck internally upon this
envelope in such a manner as to constitute, after the envelope has been folded, a
second and absolutely opaque internal envelope.
2. The lined envelope described in Claim 1, in which the internal opaque sheet
is cut out of a shape almost exactly similar to that of the envelope, and arranged
so as to coincide with it in such a manner as to leave uncovered the portion of
the envelope which is to be stuck down; the internal sheet being stuck upon the
envelope by its two upper edges, the two sheets so connected being then passed
through the envelope folding machine, in order to form a lined envelope into
which the folded letter may be readily introduced, as above described and repre-
sented in Figures 1 to 4 of the drawing.
.
101
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.