US1690892A - Can closure - Google Patents

Description

Nov. 6, 1928.

J. C. DIAME NT can cnosunn Filed Aug. 2, 1926 s ag:

. Patented Now '6, 1928.

JOHN cnnvnn. murmur, or. ramen'ron, NEW .mnsnr.

can cnosunn.

My invention relates to new and useful improvements in cans and more particularly to a closure therefor, the princi al object of the invention residing in providing the closurewith, a transparent insert whereby the contents of the can may be viewed.

Another object of'the invention resides in the provision of novel'means for seating or positioning the-transparent insert whereby lo a tight seal-is provided.

- A further ob'ect of the invention consists in so forming t e closure that the trans arent insert may be secured therein by rolling,

spinning, or dieing the closure. 15.

sides in positioning the transparent insert in the closure at such a point that the closure may flex during the canning operation, it being understood that when steam is applied to the cans, the contents within the-can will expand therebyforcing the closure outwardly to uncertain extent and; then when the'contentsotthe can is cooled the same will be contracted and avacuum will be created within the-can thereby causing an inward movement of the closure. I A further object of the invention consists in so forming the closure from one piece" ofmetal that the. trans arent insert may later be secured thereon y rolling, spinnmg or dieing the closure.

With the above and other objects'in view, which ;will appear as the description ro-' ceeds, my invention consists in the nov details of construction and-arrangement of parts, described the following specification {and illustrated in. the accompanyin drawings, and whileI have illustrated an described the referred embodiments of the invention, as t ey now a pear to me, it will be understood that such 0 anges may be made as will fall within the scope of the appended claim.-

'In the drawings: I r 'Fig. 1 is atop plan of the closure with the transparent insert inposition. l a

Fig. 2 is a transverse vertical secti 11 through the closure and insert. a

Figs. ,3, 4 and -5 are fragmental sectional details showing the several positions of the parts adjacent the insert, Fig. 3 showing the closure, adjacent the opening for the insert,-

prior to the positioning of the insert therein, Fig. 4 shows the. insert in pos'itionland the i firstjfstep :{in the bending orfrollmg process,

Still another object. of the invention .re-

tending I n Application filed August 2, 1926. Serial No. 126,601.

and Fig. 5 illustratesthe-completed rolling to secure the insert in position. In the drawings 1 indicates one of the end closures of the can which will be secured to' the cylindrical body portiom in the usual. manner. The end closure is formed, of metal which is preferably stamped and in carrying out my invention a central opening2 is provided to be covered by the'transparent insert through WhlCh the. contents of the can maybe viewed. In the initial formation of the closure an inclined flange 3 is formed around the opening 25 and there isan u wardly extending head 4 formed intermediate the flange 3 and the horizontal body por tion 5 of the closure. As illustrated more particularly in Fig. 3 or the drawings the inclined flange 3 is on a plane somewhat lower than the plane of the horizontal portion 5. Withthe closure initially stamped as shown in Fig. 3 gasket material 6 is placed upon the flange 3 and the transparent plate or.insert 7 is seated upon the material .as more particularly illustrated in Fig. 4., The upwardly extending bead 4 is then rolled, spun or died to assume the positiofiillustrated in Fig. 4 and-is finally pressed down toassume the horizontal position disclosed in Fig. 5 'to overlie the uppersurface' of the insert 7 It will thusbe seen that the beaded portion 4 which has been pressed into the position shown in Fig. 5 will hold the transasket material 6. ermetical seal is ormed between the closure and the-insert. As stated I preferably have the. flange 3 ex-. upwardly at an angle and when thus forme the end of the flange will engagethe gasket material 6 as shown more particularly in Figs; 2, 4 and 5 of the drawings and prevent the gasket material from being drawn from its seat when a vacuum is created within the can. However, if desired, the

flange may be formed toextend in a horizontal position as distinguished .from "the.

parent insert in tight ingagem'ent with the i inclined position shown. The gasket mate- 1 rialwill also be passed around'the edge of the transparent insert asshown.

. -It will be understood that'thereare two end closures for each can and-my transparent insert may be provided in either the top'or bottom closure as may be desired. The insert is securely held in position and atight seal is provided between the closure plate and the insert. commercial canning operations the product is placed in the'cans ina raw state and after the can 1s"seale'd it is placed in boilin water or steam and cooked for various I expands the contents of closures are swelled due to the internal pres-' perio s of time depending upon the particular product canned. This cooking process sure within the can. When the can and its [closure and theinsert-to allow'a ing operation,.and the drawing in of the closure when the vacuum is created within the can. The transparent insertmust be so securely held as to prevent a breaking of the seal when the vacuum is created within the can, I have 7 illustrated anddescribed the same'is' securely g held so that the insert will In securing the insert in the closure as the can and the end arent insert away I signature. n t b b1ok'en'dur-' ing the cooking operation or by the vacuum igeaeseg created in the can after the cooling has taken place and a ti ht seal will always be provided to revent lea age or spoilage of the contents wit 'n the'can.

Having fully described my invention what I claim as new and desire tosecure by Letters'Patent is A? can closure formed with an opening therein, a portion of the-closure adjacent the opening being. depressed inwardly from the normal outer face oi the closure to form a relatively wide inwardlydirected and upwardly inclined seat surrounding the opening, a gasket received on the seat, a transparent insert-received on the gasket, and a portion of the closure adjacent the depressed portion and the periphery of the insert being depressed over the outer face of the insert to force the insert into tight engagement with theigasket'and ,to'compress the. gasket into tight engagement withthe seat. k

" In testimony ,whereof I hereunto aflix my I Jon oLEAvER

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