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Publication numberUS2122368 A
Publication typeGrant
Publication dateJun 28, 1938
Filing dateNov 21, 1936
Priority dateNov 21, 1936
Publication numberUS 2122368 A, US 2122368A, US-A-2122368, US2122368 A, US2122368A
InventorsMax L Engler
Original AssigneeGen Tire & Rubber Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 2122368 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

June 28, 1938. M. L. ENGLER PUNCH Filed Nov. 21, 1936 INVENTOR Max L. E ler BY W 7 ATTORNEYS Patented June 28, 1938 UNITED STATES PATENT OFFICE PUNCH Max L. Engler, Akron, Ohio, assignor to The General Tire & Rubber Company, Akron, Ohio, a corporation of Ohio Application November 21, 1936, Serial No. 112,061

2 Claims. (Cl. 164-124) This invention relates to punch devices and body of the device in a heat insulating body i0. more particularly to punches for formingholes Electrical energy is supplied to the resistance in semi-plastic sheet material such as unvulwire 8 by the lead-in cord ll. canized rubber and the like. In operation, the cutting edge 2 of the punch An object of the present invention is to provide l, is caused to pass down substantially through a punch that is particularly adapted for conthe uncured side wall rubber [2 of the inner tube ventional practices in the manufacture of rubber while supported on the bench l3. The notch 3 inner tubes. in the cutting edge 2, leaves a connecting ribbon Another object is to provide a punch that M of the stock that anchors the cut-out slug 15 leaves the punched-out slug free of the punch to the material of the tube wall. The major 10 cutting blade and somewhat elevated above the portion of the slug I5 is drawn up out of, and material punched in order that the slug may be inclined to the plane of the tube wall I2 when the readily grasped and torn loose by the punch oppunch is lifted, as shown in Fig. 4. The slug [5 in erator. its elevated and inclined position is easily and With the above and other object in view, quickly grasped by a worker and the ribbon I4 which will be apparent to those familiar with broken to complete the operation. This avoids the art to which this invention pertains, an emthe use of complicated means for clearing the bodiment of the present invention is disclosed in punch cavity and is very convenient and useful in the accompanying drawing, wherein operation.

Figure l is an elevational View, shown partly It is to be understood that the particular emin section with parts broken away, of a punch bodiment of the invention that is shown and assembly that embodies the present invention; described herein is for the purposes of illustration Fig. 2 is an end view of the punch blade lookand explanation and that various modifications ing in the direction of the arrows 22 of Fig. 1; in the punch and in the contour of the punch Fig. 3 is an enlarged elevational view in section cutting blade and notch, and in the carrying and g of the punch blade in an operating position in supporting means, and in the punch heating the process of punching openings for valve stems means, may be made without departing from the in an uncured rubber tube wall; invention as defined in the appended claims.

Fig. 4 is an elevational section of a portion of What I claim is: the fiat stock subsequent to the withdrawal of l. A punch for forming holes in unvulcanized the punch blade shown in dot and dash lines; rubber compound in sheet form, comprising a and punch body having a tip terminating in a cutting Fig. 5 is a perspective of a portion of the edge formed by the intersection of an external punched fiat stock with the slug shown in dot cone-shaped face and an internal cylindrical and dash lines. bore, a notch of a fraction of the depth of the :15

In the accompanying drawing the punch 1 commaterial to be cut formed in said cutting edge, prises a punch body having a hollow centered, and means for heating said cutting edge, whereby frusto-conical cutting edge 2, that is interrupted the outer face of said cone-shaped tip pulls free by a notch 3. The punch l is mounted on a of said sheet material and said inside bore draws suitable carrying means, such as the thrust mema cut slug substantially out of its hole but leaves her 4 and the supporting arm 5 by the externally the slug connected at a single localized point threaded screw 6 that forms a part of the thrust of small cross sectional area. member 4 that is secured to the supporting arm 2. The method of punching holes in sheet 5 in conventional manner, as by the nut 1. material of uncured rubber compound which con- The punch I may be heated, if desired, as sists in severing a slug of rubber from the sheet when punching valve stem holes through the side entirely around one surface portion and around wall of uncured inner tube rubber and the like, the other surface portion except over a Very by an electrical resistance wire 8, that is wound small area from which the slug may readily be about the portion of the thrust member 4 that is torn loose and lifting the slug partially from the adjacent the punch I. The resistance wire 8 is material by engagement of the slug with the embedded in suitable insulating material 9 as punching device. well known to those skilled in the art. MAX L. ENGLER.

Thermal loss is minimized by enclosing the

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2961907 *Mar 26, 1956Nov 29, 1960Boeing CoMethod of shearing locking collar from high shear rivet
US3045336 *Feb 15, 1960Jul 24, 1962IbmRemoval tool
US3075573 *Sep 23, 1959Jan 29, 1963Continental Can CoApparatus for punching holes or cutouts in thermoplastic sheet material
US3161099 *Jun 5, 1962Dec 15, 1964Ralph L CometApparatus for forming masking tabs
US3240851 *Oct 26, 1960Mar 15, 1966Owens Illinois Glass CoMethod and apparatus for severing thermoplastic material
US3255649 *Mar 12, 1965Jun 14, 1966Kvp Sutherland Paper CoSeverance line construction for cartons and the like
US3297508 *Dec 10, 1962Jan 10, 1967Meyercord CoDry strip decalcomania or transfer and method of use
US3715415 *Nov 6, 1970Feb 6, 1973American Velcro IncMethod for the manufacture of a separable fastener
US3876858 *Feb 9, 1973Apr 8, 1975French Co R TShrink-film hole-burning device
US4022205 *Nov 5, 1973May 10, 1977Tenczar Francis JFluid connectors
US4030494 *Nov 15, 1976Jun 21, 1977Francis TenczarFluid connectors
US4785655 *Jan 5, 1987Nov 22, 1988General Electric CompanyMethod and arrangement for producing knockouts for electrical equipment cabinets
US4872935 *Nov 28, 1988Oct 10, 1989Forward Technology Industries, Inc.Apparatus and method for bonding a plastic container and spout
US5451288 *Nov 5, 1992Sep 19, 1995Smith; LarryHeated die punch construction and control device
US5771764 *Sep 16, 1997Jun 30, 1998Eastman Kodak CompanyUse of cutting tools for photographic manufacturing operations
US6486442 *Oct 4, 2001Nov 26, 2002Hotset CorporationHeating device with electric heating element and thermocouple
US7171882 *Oct 15, 2003Feb 6, 2007Amros Industries, Inc.Knife-like cutting die
US7645104 *Apr 27, 2004Jan 12, 2010Avdel Uk LimitedBlind fastener and method of installation thereof
DE1301042B *Feb 26, 1965Aug 14, 1969Stahlgruber Gruber & Co OttoSchneidwerkzeug mit einem Schneidrohr zum Ausschneiden von zylindrischen Stuecken aus Gummigegenstaenden
WO2011134570A1 *Mar 9, 2011Nov 3, 2011Pöppelmann Holding GmbH & Co. KGShaping/punching tool and container
U.S. Classification83/862, 219/227, 83/171, 83/170, 83/684, 83/25, 83/16, 83/679, 219/229
International ClassificationB26F1/44
Cooperative ClassificationB26F2001/4472, B26F1/40, B26F1/44
European ClassificationB26F1/44