US224934A - Paper bag - Google Patents

Description

J. MGCULLOUGH.

Paper-Bag No. 224,934.

.agatented Feb. 24, 1880.

N. PEI'EIS. FHOTO-UTMDGRAFHER. WASHINGTON. D. C.

LnA

y UNITED STATES PATENT OFFICE.

JOSEPH MGCULLOUGH, OFPHILADELPHIA, PENNSYLVANIA.

PAPER BAG.

SPECIFICATION formingpart of Letters Patent No. 224,934, dated February 24, 1880.

` Application led August 16, 1877.

To all whom itmag/ concern:

Be it known that I, JOSEPH MCGULLOUGH, of Philadelphia, Pennsylvania, have invented anImprovement in Paper Bags, `of which the following is a specification.

This invent-ion relates to that class of paper bags known as satchel-bottoms-that is, a bag which, when filled, will readily assume a square form at its bottom end; and theinvention particularly relates to such bags when constructed from a rectangular blank or sheet of `material having its two sides folded inwardly and their edges pasted so that when 4said blank is doubled upon itself on a transverse line said pasted edges will unite and form a bag with two side seams and bellows- 1 like folded sides, whereby, when it is extended by being filled, said sides may expand and its bottom so fold as to transform its fiat form into a cubical one.` This form of bag is an exx ceedingly practical one to make, for thereason that it may be readily formed from a continuous web in thefast machines now in use, from which it may be delivered in flat form; but

such bags are of objectionable structure in themselves, none existing which are free from all the. defects known to this paper article.

One form of bag of this class has the edges of its inwardly-folded sides which form the bellows fold turned backward, so as to provide pasting-surfaces, which, when united by y doubling the blank .transversely, constitute the seam, uniting the parts in bag form. Such a bag presents the two parts forming its side walls united by an open-edged seam, which, as is obvious, will, whensubjected to the `strain incident to the useof suchl articles, be weak and liable to bedrawn apart. Bags having `this form of side seam have therefore been long since discarded as of faulty and inoperative construction.

y `It is the'purpose of this invention to remedy these defects and to produce a bag of such a construction as will provide lapped- .i Eline of its transverse folding at the bottom,

thusformin g atight `bag throughout the structure, lall of which will be more fully herein-` after set forth.

y In the drawings, Figure showsthe blank from which the bag is made; Fig. 2, a blank with the longitudinal folds; Fig. S, said blank whenfolded transversely and united in bag form; and Fig. 9, said bag with its bottom opened out and folded into square form, Figs. 3, 4, 10, and 11 being similar views of amodiiication, Fig. 5 showing a section on lineaI of Figs. 2 and 4; Figs. 6 and 7, similar views ou line b of Fig. 2 and on line o of Fig. et.

In carrying out myinvention, a rectangular strip of paper or similar material (it may be cut from a web) is cut at the points 1 l with short nicks, which are on the line 2, upon which the blank is to be folded to complete the bag.

wardly upon the lines 7 7, Fig. 1, thus forming the doubled edges 8-8, Fig. 2.V The edges of these folded laps are thenfolded outwardly on the lines 9 9 to form the pasting-flaps 10 10, Fig. 2, which laps extend from the foldingline 2 to one end of the blank, the nicks 1 l permitting this doubling. These flaps 10 10 are then coated with paste, and the blank is doubled transversely on the line 2, thus bringing the pasted flaps 10 onto the inwardlylapped sides 11, to which they are united, thus forming a lapped and flat seam, 12, as in Figs. 8 and 9, the former showing the bellows fold formed by the lapped sides as opened or spread apart. These seams 12V thus extend from the line 2 of the bottom fold and unite the sides perfectly from end to end with a lapped and iiatseam possessing great strength.

. If it is desired to omit the projecting edge 13, as in Figs. 10 and 11, this may be accomplished by cutting off such portion, as at 14, at the same time that the nicks 1 are cut and while the material is dat, as in Fig. 2. Thus constructed, the bag may be made upon the commoncontinuous machine and produced at very slight expense, as it is obvious that romove `the surplus edge 13, that the inward folds, 11, and outward folds, 10, may be accomplished by turning-guides, the ,paste applied to the flaps 10, the bag-lengths cut off, and the transverse fold 2 made while the web passes continuously through the machine.

The bag thus produced is provided with the strongest form of side seams, `which are made to extend throughout the entire length of the The sides 56 of this blank are then folded inbag-sides, thus forming an article without aeentral seam, each seam of tWo thicknesses, 1o Weak points of union, and one which is Whole Without loose aps, as set forth.

throughout its structure. In testimony whereof I have signed my What, therefore, is claimed isname to this specification in the presence of As a new artiele of manufacture, a square .two subscribing Witnesses.

closed bottom paper bag consisting of one JOSEPH MCGULLOUGH.

sheet of paper, having the bottom and two Witnesses:

opposite sides seamless, With the folds upon T. SEYMOUR SCOTT,

the bottom, and at each of the two other sides GI-IAs. D. WAsHBURN.

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