US 2599738 A
Description (OCR text may contain errors)
June 10, 1952 F AM CAM ACTUATED BAG CLOSURE MECHANISM Filed Jan. 25, 1950 P n lilIIlIli 11.1. AMA
INVENTOR. FLETCHER AMES Md 7 ATTORNEYS Patentecl June 10, 1952 CAM ACTUATED BAG CLOSURE IWECHANISM Fletcher Ames, Palo Alto, Calif., assignor to Ames Harris Neville 00., San Francisco, Calif., a corporation of California Application January 23, 1950, Serial No. 140,034
2 Claims. 1
This invention relates to an improved bag closure mechanism.
The particular embodiment of my invention which is illustrated in the drawings and which will be described hereinafter in greater detail comprises, generally, a bifurcated or U- shaped clamping bar formed with opposed cam surfaces and provided with opposed clamping edges normally spring tensioned apart to receive between them the mouth of a cloth or canvas bag or the like. Incorporated within the mechanism i a cam comprising a U-shaped member mounted pivotally to the clamping bar and movable against the cam faces to cam the gripping edges of the clamping bar toward one another and tightly against the mouth of a bag disposed therebetween.
The principal object of the present invention is to provide a cam actuated bag closure mechanism capable of providing an extremely tight closure for the mouth of a bag and which is constructed so as to be readily removable from and replaceable on the mouth of a said bag.
Further objects of the present invention are to provide a bag closure mechanism which is exceedingly easy and simple to operate, which is of sturdy construction, and which may be manuf actured relatively inexpensively.
Other objects of the present invention will become apparent upon reading the following specification and referring to the accompanying drawings in which similar characters of reference represent corresponding parts in each of the several views.
In the drawings:
Fig. 1 is a perspective view of the closure mechanism operably attached to the mouth of a water bag.
Fig. 2 is a perspective view showing the bag closure mechanism adjacent to but removed from the open mouth of a water bag.
Fig. 3 is a sectional view taken on line 3-3 of Fig. 1.
Referring now more particularly to the drawings, there is indicated generally at A one conventional type of water has shown in association with a bag closure mechanism embodying the present invention and indicated generally at B.
The water bag construction which is illustrated in the drawings and which has heretofore been designated generally at A, comprises essentially a rectangular flat collapsible bag made of closely woven canvas or other suitable material and which has been stitched around its side and bottom edges. A pouring spout, such as indicated at 2 4, having a removable cap 9 is conventionally provided to facilitate pouring of liquid contents from the bag. The top edges 5 and 6 of the bag are shown as being stitched as at I together inwardly for short distances from the side edges of the bag to define a relatively large, elongated, collapsible centrally located mouth or opening 8. Large openings, such as opening 8, are conventionally provided in water bags of the type illustrated in the drawings to facilitate filling of the bags with water and to permit access into the interior of the bag to cleanse and dry it when such becomes necessary.
The bag closure mechanism, heretofore indicated generally at B, comprises an elongated bifurcated clamping bar which is preferably formed from one integral piece of material, such as spring metal or the like. The clamping bar comprises, more specifically, a bifurcated back portion ll, two opposed outwardly projecting longitudinally extending rib portions I2, and two opposed longitudinally extending clamping edges l3. The spring material from which the clamping bar is made is adapted to normally spring tension the clamping edges I3 apart from one another a distance suflicient to permit easy insertion therebetween of the top edges 5 and 6 of the bag which define the mouth of the bag.
A pair of identically formed substantially U- shaped cams [4 are supported pivotally in suitable apertures formed through back portion ll of the clamping bar adjacent opposite ends thereof. Each U-shaped cam I4 is formed with slightly divergently outwardly projecting legs, and each cam is adapted for pivotal movement downwardly about its respective axis in a manner whereby the legs of the cam engage opposed surfaces of the projecting reinforcing ribs l2 to cam the opposed clamping edges of the bar toward'one another and tightly against the mouth swung upwardly out of engagement with ribs l2,
and this action will permit the clamping edges of the bar to spring open and allow the clamping bar to be easily withdrawn from the mouth of the bag.
Suitable apertures I! may be provided in the back portion II of the clamping bar adjacent opposite ends thereof to receive therethrough knotted ends [8 of a suitable carrying rope or handle I9.
Although it has been found that the present has closure mechanism, hereinabove specifically described, is particularly useful as a .closure for water bags such as has heretofore been indicated at A, it is understood that this invention is not confined or restricted exclusively to such use, or any several particular uses, but may be employed as a closure for any type of bag on which the device may be used practically.
Although the present invention has been described in some detail by way of illustration and example, it is understood that certain changes and modifications may be made within the spirit of the invention and scope of the appended claims.
1. A has closure mechanism comprising, an integrally formed spring metal clamping bar comprising a bifurcated back portion defining two opposed legs and a, pair of outwardly pro.- j ecting opposed stifiening ribs extending longitudinally of said clamping bar and presenting opposed cam surfaces, said clamping bar comprising a pair of opposed clamping edges disposed inwardly of said ribs and movable toward and away from one another to receive therebetween the mouth of a bag, the springiness of said metal normally tensioning said clamping edges away, from one another to an open position, a Cam comprising a. U-shaped metal rod defining a web portion and, two slightly divergently outwardly projecting legs, a pair of registering a ertures formed through the legs 4 jected through said registering apertures and pivotally supported therein, the said divergently projecting legs of said cam being swingable about its pivotal axis to engage said opposed cam surfaces presented by said stifiening ribs for camming said opposed clamping edges toward one another and against the spring forces of the material tending to spring tension the clamping edges open and away from one another.
2. A bag closure mechanism according to claim 1 and wherein. a pair of spaced knobs are provided on the outer side of at least one of said stiffening ribs arranged and located for snaplocking engagement with an associated leg of saidcam when the latter has been moved into camming engagement with Said rib.
REFERENCES CITED The following references are of record in the file of this patent:
UNITED STATES PATENTS Number Name Date 603,773- Mitchell May 10, 189.8, 709,066 Waterman Sept. 16-, 1.902 726,012 Andrew Apr. 21, 1903 900,625 Wall-is Oct. 6, 1908 966,237 De Ybarrondo Aug. 2, 1910 1,068,362. ORiely July 22, 1913 1,083,873 Burch Jan. 6, 1914 1,127,38r1 Adams Feb.v 9, 19 15 1,403,707 Quarnstrom Jan. 17, 1922 1,596,355 Hirsch Aug. 17, 1926 2,008,195 Thompson July 16, 1935 2,500,363 Koeppel Mar. 14, 1950 FOREIGN PATENTS Number Country Date 374,312 Great Britain June 9, 1932