US531302A - Michael carey - Google Patents
Michael carey Download PDFInfo
- Publication number
- US531302A US531302A US531302DA US531302A US 531302 A US531302 A US 531302A US 531302D A US531302D A US 531302DA US 531302 A US531302 A US 531302A
- Authority
- US
- United States
- Prior art keywords
- envelope
- carey
- michael
- composition
- flap
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 241001125671 Eretmochelys imbricata Species 0.000 title description 2
- 239000000203 mixture Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 3
- 238000010025 steaming Methods 0.000 description 2
- 240000007829 Haematoxylum campechianum Species 0.000 description 1
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D27/00—Envelopes or like essentially-rectangular flexible containers for postal or other purposes having no structural provision for thickness of contents
- B65D27/12—Closures
- B65D27/30—Closures with special means for indicating unauthorised opening
Definitions
- This invention relates to. an envelope which is so constructed that any attempt to open the gummed flap by steaming or mcistening will be at once detected.
- Figure 1 is a perspective view of my improved envelope, showing it open.
- Fig. 2 is a cross section of the same, and
- Fig. 3 a perspective view of the envelope, showing the efiects of steaming or x 5 moistening.
- the letter a represents an envelope having a gummed flap a, as usual. I secure to the inner face of the flap, a composition or powder b, which is dissoluble by steam or moistzo ure, and which when dissolved, will penetrate and discolor the flap.
- composition which I prefer to use consists of about three parts of powdered soda, one part of extract of logwood and one-half :5 part of copperas.
- the composition is applied in a thin layer to the envelope and is confined and protected by a covering a, which consists of a piece of paper having a gummed edge and secured to 0 the envelope over the composition.
- the covering 6, prevents the composition 6, from discoloring the letters contained in the envelope, and it also prevents accidental contact between the tongue and the composition, during the closing of the envelope.
- My improved envelope may be used for ordinary correspondence and also .to convey valuable and secret communications.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Sensitive Colour Forming Recording (AREA)
Description
M. CAREY.
ENVELOPE. 4
Patented Dec. 25, 1894.
(No Model.) I
Fla-2. v
NITED STATES PATENT OFFICE.
MICHAEL CAREY, OF NEW YORK, N. Y.
ENVELOPE.
SPECIFICATION forming part of Letters Patent No. 531,302, dated December 25, 1894.
Application filed June 5, 1894. Serial No. 613,5605. (No model.)
To all whom it may concern:
Be it known that I, MICHAEL CAREY, of New York city, New York, have invented an Improved Envelope, of which the following is 5 a specification.
This invention relates to. an envelope which is so constructed that any attempt to open the gummed flap by steaming or mcistening will be at once detected.
[0 In the accompanying drawings: Figure 1 is a perspective view of my improved envelope, showing it open. Fig. 2 is a cross section of the same, and Fig. 3 a perspective view of the envelope, showing the efiects of steaming or x 5 moistening.
The letter a, represents an envelope having a gummed flap a, as usual. I secure to the inner face of the flap, a composition or powder b, which is dissoluble by steam or moistzo ure, and which when dissolved, will penetrate and discolor the flap.
The composition which I prefer to use consists of about three parts of powdered soda, one part of extract of logwood and one-half :5 part of copperas.
The composition is applied in a thin layer to the envelope and is confined and protected by a covering a, which consists of a piece of paper having a gummed edge and secured to 0 the envelope over the composition.
and will strike through the body of the flap,
to discolor the outer face of the same, as at d, 3 5 Fig. 3. In this way any attempt to tamper with the envelope, is at once disclosed.
The covering 6, prevents the composition 6, from discoloring the letters contained in the envelope, and it also prevents accidental contact between the tongue and the composition, during the closing of the envelope.
My improved envelope may be used for ordinary correspondence and also .to convey valuable and secret communications.
What I claim is An envelope provided on its inner flap with a powder which is an absorbent of water and soluble therein, and whosesolution is a coloring compound, said powder being secured in place and likewise protected from accidental contact with moisture, by a suitable covering, substantially as described.
MICHAEL CAREY.
Witnesses:
F. v. BRIESEN, WILLIAM ScHULz.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US531302A true US531302A (en) | 1894-12-25 |
Family
ID=2600077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US531302D Expired - Lifetime US531302A (en) | Michael carey |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US531302A (en) |
-
0
- US US531302D patent/US531302A/en not_active Expired - Lifetime
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