US482073A - Means for detecting the opening of sealed envelopes - Google Patents

Means for detecting the opening of sealed envelopes Download PDF

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Publication number
US482073A
US482073A US482073DA US482073A US 482073 A US482073 A US 482073A US 482073D A US482073D A US 482073DA US 482073 A US482073 A US 482073A
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Prior art keywords
envelope
detecting
sealed
opening
sealed envelopes
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    • 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

  • the object of my invention is to prevent any person from unsealing an envelope' by moisture Without the fact being apparent; and to this end it consists in the means herein specified and claimed.
  • A is the envelope proper.
  • O is the part of the envelope to which the flap B is sealed.
  • D is a spot of ink, composition, or substance applied to the under side of the flap of the envelope, so that when sealed itis between the ap B and the part C, and concealed from view.
  • E represents the gum under the iiap B.
  • envelope is im material. ⁇ Ido not confine myp self to any particular design nor to the particular composition of ink.
  • ink or composition of the nature hereinbefore described is placed or printed in any manner upon the under side of the flap or on the part C of the envelope, so that when sealed it will lie between said two surfaces.
  • the envelope with its contents are now ready for mailing. Should any one attempt to open the envelope unlawfully by moisture, lthe said ink composition which is between the gummed surfaces will immediately run or spread ovel1 and into the paper, so that when resealed and again opened by the legitimate or rightful receiver of the envelope it will be readily seen that it has been previously opened and investigation may be demanded. The importance of this or other means of detection will beapparent to those who have suffered for the want of it.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
  • Bag Frames (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)

Description

oooooooo M BBBBBBBB ET vL. P. cALLM-EYBR.
GGGGGGGGGGG ENING 0F SEALED BNVBLOPBS.
Patented Sept.`6, 1892'.
'-Mll l ummm 1 :I:
umm
UNITED STATES PATENT OFFICE.
LONIE P. CALLMEYER, AOF MADISON, NEV JERSEY.
MEANS FOR DETECTING THE OPENING OF SEALED ENVELOPES.
SPECIFICATION forming part of Letters PatentNo. 482,073, dated September 6, 1892.
Application ined July 25, lsel.
.To all whom it may concern:
Be it known that I, LONIE P. CALLMEYER, a citizen of the United States of America, residing at Madison, county of Morris, State of New Jersey, have invented and made a new and useful invention in means for detecting when an envelope, after having been once sealed, has been unlawfully opened intransit from the sender of the same to the one to whom it is directed, of which the following is a specification.
It is well known that in order to open an envelope which has been sealed with gum, Without detection, it is only necessary to soften the gum by moisture. This is usually done by steaming, and after such an operation the envelope is readily resealed so that the fact that it has been opened cannot be known with certainty.
The object of my invention is to prevent any person from unsealing an envelope' by moisture Without the fact being apparent; and to this end it consists in the means herein specified and claimed.
In order that persons skilled in the art may understand, construct, and use myinvention, I will proceed to describe it, referring to the drawings, in which- Figure l is a representation of my invention as applied to an envelope previous to sealing. Fig. 2 is the same, showing the appearance of the envelope after the same has been opened by softening the gum by moisture.
A is the envelope proper.-
Bis the flap to which gum is usually applied.
O is the part of the envelope to which the flap B is sealed.
D isa spot of ink, composition, or substance applied to the under side of the flap of the envelope, so that when sealed itis between the ap B and the part C, and concealed from view.
E represents the gum under the iiap B.
Serial No. 400,711- (No model.)
envelope is im material.` Ido not confine myp self to any particular design nor to the particular composition of ink.
To illustrate how my invention is to be perf formed, I will describe the operation. Before the envelope is closed by sealing, ink or composition of the nature hereinbefore described is placed or printed in any manner upon the under side of the flap or on the part C of the envelope, so that when sealed it will lie between said two surfaces. The envelope with its contents are now ready for mailing. Should any one attempt to open the envelope unlawfully by moisture, lthe said ink composition which is between the gummed surfaces will immediately run or spread ovel1 and into the paper, so that when resealed and again opened by the legitimate or rightful receiver of the envelope it will be readily seen that it has been previously opened and investigation may be demanded. The importance of this or other means of detection will beapparent to those who have suffered for the want of it.
I-Iaving now fully described my invention and the manner in which I have embodied it, what I claim as my invention, and desire to secure by Letters Patent, is-
` The herein-described envelope having soluble or fugitive ink applied to its inner surface and adapted to be covered and inclosed by a flap, substantially as described, said soluble or fugitive ink being slightly removed from the line of gum for securing the Hap, Substantially as described.
LoNIE P. oALLuEYER. Witnesses:
VIRGINIE CALLMEYER, AMos C. RATHBUN.
US482073D Means for detecting the opening of sealed envelopes Expired - Lifetime US482073A (en)

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