US902301A - Safety-envelop. - Google Patents

Description

I. KLEIN.

SAFETY ENVELOP.

APPLICATION FILED NOV. 13, 1906.

902,301. Patented 0@t.'27,190s.

INVENTOH W/T/VES8ES..' 'J/w oxw. dor Klein, By

UNIT STATES PATENT OF IQIDORE KLEIN, on NEW YoaK, a. v

S FETY-savages.

110. 90.2301. Specification of Letters Patent. Patented Oct. 27, 1908. Application filed November 13, 1906. SerialNo. 343,194.

To all whom it may concern: simply the margin 4', but I deem it prefer- Be it known that I,"Isn)onn KLEIN,'a citi able to save the weight in this Way and to zen of the United States, residing at New have the guinmed margin 4" correspond in York city, in the county of New York and shape with the margin of the flap 3. Inso State of New York, have invented certain stead othaving the rear flap gummed as at new and useful Improvements in Safety-En- 4 the upper flap 3 might be gummed along velops, of which the followlng IS a specificaits inner margin with exactly 'the same effect tion. and I wish it understood that I regard such My invention relates to envelops and more a transposition-of the gum as entirely equ1v- 65 particularly to envelops which cannot be alent to the'use of the gum on the rear flap opened without damage and resultant detecand as entirely within my invention. The tlon. margin of this flap 4 is gummed .on its out- The invention consists in a certain form side face as at 4" for the attachment of the of blank, and an arrangement of sealing margin ofthe upper flap 3. The end llaps 7o flaps such as will be later described, and its 5 and 6 are substantially of the same form object is to provide an envelop whose flaps as the usual end flaps of envelope except that when sealed cannot be opened by the use of along their upper edges they are bent backsteam or the insertion of a knife blade or wardly to form the auxiliary flaps '5' (3. other instrument beneath them without so Th e'innor surface of the flaps 5 and 6 has badly daniaging. the envelop that the unaugum or other adhesive placed along the marthorized breaking of the inrlosl'u'e is plainly gills as at 5 6" (i By linkof evident. l I these gumnied margins the flaps are pasted I have shown my invention in'the accomdown upon the back flap 4 in the position as I panying drawing, wherein shown in Fig. 2. It wil1 be seen that the so Figure 1 is a rear view of the envelop end of'flap at 6 projects'up under the sealed. Fig. 2 is a rear view of the envelop extreme end of the flap?) and' is protected unsealed. Fig. 3 is a rear view showing the thereby. I

envelop with one of the flaps opened out to In sealing the envelop, the flap 3isbrought" show certain details thereof. Fig.- 4:1is a down and'by means of the gum 4" its margin 85 plan of the blank from which the envelop is attached to the back flap 4. Then the is to be made. folds or auxiliary flaps 5" 6" are moistened Like numerals throughout all the figures and folded over on to the outer face of'the indicate like parts. marginof flap 3 as shown in Fig. 1 It will 2 designates that portion of the blank now be seen that counting from the bottom so which forms the front of the envelop; there are three gummed faces tb be attacked is the upper flap, which is usually used before any opening can be made into the r, in enve'lops. I envelop by attempting to raise the flaps 5 4 is the lower flap, and 5 and 6 are the two and that the flap 3 is not only helddown by side flaps. The lower flap 4: instead of being the gummed margin 4:",but that it 1s pro- 90 pointed a d extending to the middle of the tected by the auxiliary flaps 5 6. It 1s also envelop when folded, is of suflicient deptli'at to be noticed that were the flaps 5 6 to be its side edges to extend up to the fold of the raised the edge of the top flap would be top flap 3. A triangular shaped portion protectedby the edges of the side flaps 5 may be out out in its center with edges 4' and'G t0 the extent of not allowing a knife 100 which, when the flap is folded extend downblade to be inserted under the edge of the ward parallel with the upper edges of the flap 3, or preventing the insertion 'of any 4 side flaps 5 and 6. The edge 4: is not in round instrument, as pencil or pen holder,

alinenient with the edges of the side flaps, as --which'byits rotation might raise the flap a they are before sealing, but project a slight This is a most important point as it has been 1 distance above said flaps as shown in Figs. found in practice that the top flap 3 being. 2 and 3. l on a levelwith the main portion of fiaps 5 It will be evident that the. rear flap may and 6 absolutely prevents the insertion sucei'tend up to the fold of flap 3 along its ences'sfully of any nstruments for opening the tire upper edge, and it is also evident that flap 8. Aga1n',theaux1l1ary flaps o 6 pro- 9 the entire space designed to be covered by tect'the iguni attaching flap 3 to 4 and thus the flap 3 might be gun-lined instead of ]\1Si3- prevent steaming the letter open- The fact that the rear flap 4 also extends up to a dista'nce beyond the margin of flap 3 is also of importance as an instrument inserted under the side flaps and 6 must first open the gummed margin 5' 6, is then'met by the gummed margins 5" 6 and lastly it is met by the gummed margin 4'.

Another point of va lue is the fact that the gummed margin l" of the back flap 4 extends up to the edge of the envelop and that the auxiliary flaps 5' 6 also extend up to the extreme upper. edge of the envelop. Thus the top flap 3 is protected from the insert-ion of a knife blade not only at its lower corner but along its whole extended margin.

' .lVith ordinary envelops it is possible to insort a pencil or other round object along the upper edge between the sealing flap and the main portion of the envelop and ,then by rotating the pencil or roller to open the flap 3 without in any manner marring the envelop, or at any rate open it sufficiently that the contents may be examined or drawn out. This is not the case with envelops made according to my invention as it is impossible in the first place to insert any instrument between the 'fiap'3 and the main portion of the envelop by raising the auxiliary flaps and also because with the double holding surface given by the margin 4'' and the auxiliary flap there can be no lifting of the upper flap away from the gummed surface but only a tearing of the flap which is, of

course, in'unediately shown. As an additional protection against any tampering with the envelop by lifting the side flaps 5 and 6, I provide the bottom flap 4 with two inwardly turned flaps 4" which are gummed on their outside faces and by th s gum are attached to the inside face of part 2 of the envelop, thus forming a sort of pocket of the rear flap and the front of the envelop. lVhen these auxiliary flaps 4 are used, even if the side flaps were raised, ,it would still be necessary to detach the rearflap from the front face of the envelop. It is to be also noted that the rear flap being covered by the side flaps 5 and 6, it is impossible to steam open the auxiliary flaps 4, they being fully protected by the side flaps. The envelop is so securely sealed by reason of these different gummed portions that as so 'fardescribed it is practically impossible to open it without mu tilating it or without cut ting off one edge.

As in many offices, a small pointed instrurxent is usedfor inserting under the edge of the flap and cutting through it when open ing letters, itis necessary to provide means for the insertion of saidinstrument. I do this, by cutting away the rear flap as at 4" at its junction with thegside'flaps and the face of the envelop. Through the opening thus formed at each lower corner of the envelop, an instrument may be inserted to cut through either atthe side ofthe envelop or at the bottom edge thereof.

My invention is simple and may be cheaply i made, and does not require any wide Variation in the form of envelop machinery at present in use. It 1s thoroughly effective in operation and prevents any unauthorized tampering with the envelopwithout detection. Having described my invention what I claim is: i 1

1. An envelop having an upper sealing flap and side flaps, a lower flap extending upwardly beneath the side flaps and having a gummed margin projecting beyond the upper edge of the side flaps along its entire length adapted to engage with the margin of the sealing flap when the latter is sealed down, said side flaps being gummed to the outer face of the lower flap and having free auxiliary flaps extending along the whole length of their upper edges and directly attached to and in one piece with the upper edges of the side rflap, said auxiliary flaps being provided on their undersurface with an adhesive and being adapted to cover and be attached to the outside margin of the sealing flap along its whole length when the latter is sealed. I

2. An envelop having an upper sealing flap and side flaps, a lower flap extending upwardly beneath the side flaps projecting beyond the same along the entire length thereof and having a gummed margin adapt ed to engage with the margin of the sealing flap along its entire length when the latter is scaled down, auxiliary flaps extending along the entire lengthof the side edges of the lower flap, folded inwardly and attached to theinside face of the front of the envelop, said main side flaps having an upper margin continuous with and abutting against the entire length of the'lower edge of the sealing flap when the latter is sealed, and being provided with "auxiliary [laps extending the entire length of said upper margin directly faces for attachment to the sealing flap 3, i

when the envelop is folded, substantially as described.

LA. blank for-envelope having the face portion 2, the sealing flap 3, the lower flap/l having the gummed margins and the auxiliary gummed side flaps 4', and the two 1 end flaps 5 and 6 provided with the auxiliary flaps 5 6 gunnned on their inner surfaces for attachment to. the sealing flap 3, when the envelop is folded, substantially as described. 7

In testimony whereof, I have signed my name to this specification i two subscribing Witnesses, January 1906.

ISID

Witnesses n the presence of this 18th day of ORE KLEIN.

J. A. VERNON.

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