US1607825A

US1607825A - Threaded cap

Info

Publication number: US1607825A
Application number: US60420A
Authority: US
Inventors: Hammer Charles
Original assignee: AMERICAN METAL CAP CO
Current assignee: AMERICAN METAL CAP CO
Priority date: 1925-10-05
Filing date: 1925-10-05
Publication date: 1926-11-23
Anticipated expiration: 1943-11-23

Description

' Nov. 23 1926. 1,607,825

C. HAMMER THREADED CAP Filed Oct. 5 1925 Patented Nov. 23, 1926.

UNITED STATES PATENT OFFICE.

CHARLES HAMMER, or HoLLrs 00cm eonrnvnnnnnw YORK, ASSIGNOR 'ro AMERI- oAn METAL car COMPANY, or BROOKLYN, NEW YORK, A oonrona'rron 01? NEW YORK.

' THREADED oer.

This invention relates to metal caps, particularly to that style known as threaded caps, either of thedivided or the continuous .thread variety, the object of the invention being to provide an improved thread cap simple in construction, easily and inexpensively manufactured, and more sanitary in use.

In the manufacture of a large number of threaded caps from sheet metal, it is the practice to entirely fill one side of the metal sheet with a specified number of printed or coated caps in certain colors together with the desired trade marks or ad vertising symbols, and then press from this sheet the caps having a top and a skirt provided with a strengthened or beaded lower edge formed by turning the lower edge outwardly and upwardly and the skirt is pro vided with suitable locking threads, The

result is that the top offthe cap and that portion of the skirt down to the curled edge is of one color as for instance white while the beaded edge'has a brass appearance corresponding to that on the inside of the cap. 'This is not. only unsightly but is also unsanitary in that the outwardly upturned lower edge forms a joint for the reception of moisture and also has a tendency to crack or chip the enamel or coating on the skirt during the formation of this strengthened edge. v

The object of the present improvement therefore is to provide a cap which will have its lower edge so formed as to'prevent the cracking of the coating of the skirt during the formation of such edge and prevent the formation of any crack or seam on the outside of the skirt thereby providing not only a more sanitary but a more pleasing form of cap.

In the drawings accompanying and forming a part of this specification, Fig. 1 is a side view of this improved cap and Fig 2 is a bottom view thereof and Fig. 3 is a cross sectional view of the can.

Similar characters of reference indicate corresponding parts in the several views.

Before explaining in detail the present improvement and mode of operation thereof, I desire to have it understood that the invention is not limited to the details of const'ruction and arrangement of parts which are illustrated in the accompanying drawings, since the invention is capable of other embodiments, and that the phraseology which I employ is for-the purpose of description and not of limitation.

This improved cap comprises a coated or enameled top 2 provided with a coated or enameled depending flange or skirt 3 usually provided with suitable reinforcing knurls or corrugations 4 and cap retaining projections shown in the form of threads 5. These threads may either be of the divided form or of the continuous form. In

the form-shown the thread extends practically around the cap, it being narrow and shallow at its entering end and wide and deep as it approaches its opposite end whereby for a considerable distance around the cap the lower'under edge of the-thread is substantially parallel with the lower edge of the cap while the thread is inclined along its top to engage a suitable thread or retaining projection on the container. The lower edge of the cap is provided with a strengthened or reinforced edge 6 usually obtained by curling or. beading the edge, but in this improved form of cap this edge is bent inwardly and upwardly on the inside of the cap, forming a very small but evenreinforced edge so that the entire skirt has a similar appearance or color in that if it is white, blueor other color,- the entire skirt has this same color and is not broken as heretofore by having a portion of it white.

and a portion of it brass colored. The bending of the lower edge inwardly upon itself prevents the breaking or 'chipping of the enamel on the skirt by the contact of the outwardly bent edge in the press during the-formation of the skirt.

It will be observed that the inwardly and I without attempting to set ,forth all of the forms in which it may be made, or all of the modes ofits use, I.claim': I

1. A rotatable threaded metal cap comprising an exteriorly coated or enameled top and skirt having a locking projection or thread therein, the lower edge thereof being bent inwardly and upwardly to form a curled edge of such size that it is free of contact with the container whereby the coated skirt has the same appearance throughout every part of the exterior thereof.

2. A-rotatablethreaded metal cap com- "prising an exteriorly coatedor enameled topandskirt, said skirt having a locking thread-0f non-uniform cross section, the lower edge of the coated skirt being bent inwardly and upwardly ;to form a curled,

' beaded-or strengthened lower edge of such size that it is free of contact with the container and having the same coated appearance as the rest of the exterior of the skirt.

3. A rotatable threaded metal cap comprising an exteriorly coated or enameled top and skirt, said skirt having a single continuous locking thread extending substantially around the skirt, the lower edge of the coated skirt being inwardly and upwardly bent to form a curled, beaded or strengthened lower edge of such size that it is free of contact with the container and having the samecoated appearance as the rest of the exterior of the skirt.

4. A rotatable threaded metal cap comprising an exteriorly coated or enameled top and skirt, said skirt having a single continuous locking thread of non-uniform cross-section extending substantially around the skirt, the lower edge of the coated skirt being inwardly and upwardly bent to form a curled, beaded o'r strengthened lower edge of such size that it is free of contact with the container and having the same coated appearance as the rest of the exterior of the 5 art.

5. A rotatable threaded metal .cap comprising an exteriorly coated or enamaled top and shallow skirt, said skirt having a locking thread of non-uniform cross section and having between the thread and the top thereof a series of corrugations, the lower 1 edge of the coated skirt being bent inwardly and upwardly to form a curled, beaded or strengthened lower edge of such size that it is free of contact with the container and having the same coated appearance as the restof the exterior of the skirt.

Signed'at Brooklyn, New York, this 2nd day of October 1925.

CHARLES HAMMER.