US2478962A - Can opening key - Google Patents

Description

G. P. ZIEHMER, JR

CAN OPENING KEY 2 Sheets-Sheet 1 Filed Aug. 1, 194a I INI ENTOR.

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ATTORNEYS Patented Aug. 16, 1949 @FENING KEY Geongo:P: ..Zielamer- 1ga Nemloflagfi lii aesignm to, Ame ni'ganlqam Company, New Zomln. Hel a, eoiinoraiimoj new Jersey 7 mugiistzsl, 1948; 500mm 7 41' came, (01.22%52,

lik mesenin irmeniiem relates} to! waxin s im manmmemzwbicularwlyrmazwemembneaksofi; man a method-makin h& &ameei6r en-- ns: such anisrbw remov n the team ng: strip).

Am obi-eat of" tgia inyenfiom is; the nmvisiona oi a kex'liaying; a; novel form; ofi welding-g lugs;- which nrp ide oxg easss wemins and whichflrmlx secure the key: mama ear. each-a weldin gs;- be omxei: from metal: 04%, the keyadiae nrtomontigpous thezslotathuss limin fin g e n c se l0:

HWQQEEEQViQiHgg extra; aneraisions. or extra. metah terfprm M 1 85; mt dueineibhe eostlofi thelke a 1 a Still anewers hieehoirthesinyentiomisdehe ro.:

Wsiomofimmeizhed oimmniae iwmgwuch a!. key- 1411 utilizine; s mmedimomationa,

umemn m hermbimtstamt! aciYan-tageaofi the; invention will be apparent as it is better: undersimqdzfmm-ltheimlowingzdeaorintimi whim, taken in; oenneetiom with; the:- ase mnanysin z drawingm; discl ses; a nreiemfelda embmlimem; thereof.

nefem r ewwthegcimwingea; v v Figure 14. s? almrsnefi ve YEW effthe unn ni umma tearin stria-leanhavingzazkey em nae-lying the: present: invami m attaeheds filxexetoa: za-

Fig; ms. amenl-argedllone mdimzhseetion.talzem substantiating along; thefifinfir :62- im l awiflhparts broken awam; 1

Ei 35 is; a); transiversa se tiom taken; substantiallx alon gthe. linc=3-3einlE n2aa Fig; 4,isl.alsentionaliview simiiarmmEi NBstakem hfi mtial-malung thelineA-J inlfiiglzp Rig; 5Qis wimp lain view ofithesnontiomoiztw A 6; a seetionalwiew similar-2 toflifig. 2: andf. showing: the-key; (with: nariss, broken awaw':

mediatelig, aitee it: has; beam bmkeri amy: fromi theacan;

Fig. '7 is a longitudinal section takemthmilgl'n one orm fme ame i015? fomxing: key: and il'lustraiing; the ina'themanuiaefiunee of therk hwithrpantsmbmkem firWflrYi-I I E ia 8 is; al. transverse seetion; taken; suhstana tialiy, along, the line imF-igz 5 with: p brloli'emawazyg Fig 9 ieailongitudinalesentien :simi-lartm-Fig: '1: and illusisnating manualstemimthmmanufaetm; ontbekeyaw tmmrtsmrokem awamamh Rig I0; 'is-, mtranswem scetion; taker-r1 substam-r 25 one made on whiulmtamninates inz a; man- We l l'mwhiohaewti ndszblmtd the sidezrseami m &..top'i end member l1. also fnrmemofisheat mtitazl iisiscv curediwbhabadw kl; preferably in awonventidiial double Hi5.) 'llhiswnfisoiaeamisnbenedaimtlii eual mannenbyvthmneme ahofibhaztaaninasatzim with. a. slotted; f8 wniehis: mdfemBl-aw Wflfifiditfl: the: ten. end memberell tmtenmonanilw helm it ingp'lacez om the? during: stonafiea. like: keyr- $9.1 i-a: formed: nmfemlily ap; able piece: of; round wire. providing: az. on-lilax-rki. memhoi meyshamembenemm a-loomhandlefl; Bhe 'eppositezenmofi timshanki is formed with a flat section 23. fiat-:seetiori 2 igoirehealmy isiormedxwitifi an oblong depnession; or 26:. whicm em; down; into; the? of; the: key neanlw full thickness; leaving": relatively" thimfifihh'flmii wall- 25,. bat/tum; wall; is; to: provide an elongated slot2fim3fiaptudztomaefle meetongfiie lhafl'bheg'cam whemtfieccamia M21363 'liheabottomtwallil'fi isf-iirthm-providedzwith welding; projections; or} beats; 21;;28 whim aiie 16a: oatedwnaatr: eachend or; the slutaanfi-whiem temi: outwardlw beyond: 01: below the: keyas 1 shown inlf ig zl The: key is seeuredi to cow/em; pxtferablw by spoi welding; tliroughi the" am projeoiionsa to: holch-itz. om can for shipment? and; stome as here'inheim'e menifionedi- V a2 preoautioname measum itaia desirable to useat: weldimgr, electrode shaped; to:-

mm the; keydepression 24 during the welfiingiopemtiomso: ilAwil-I been: dtreetlm-ommtlie weltling projections w lnieventajshea'sning Cher-mom;

"the welding proiections; .213 28 pmirfafilfi aw square im orosseseetsiom ends; 015 sntisdamaiail'lyi the some? the slots; 26: so: that; may; be

4m rsadilw formedafrlem memal: mmarnw one of! the: key when; it: is:v pierced: ism provide the slot;- The inflections; therefore. aria integral! patfis i of the key and-. extenctt from: the key i'm relative thim neskpnrfiofm omeotions-z 3h of metair or may be thinner if desired The lieok's ofi the teats: onvprloiectionsa be 'rea-dflyfbroken in removingqthepkewfrmm the: can": covet-161' use? asmwill "bemarevfnlly'expiaineck axi-tlii'e time:

brokemawaw I aapreferred; oils: the; inven liidm.

the; dizawingshisolos m. sheetlmetal: cambbdw H Having aside:r seam-l 2;- The body; 14' ismovidedi remav'al ofitheetem inez p* -11 9? to lifmhe handle-part2: awayzfmm the dimmer L11, This section l nuptmesi'; the btiifir M ni; the: irmemiost: prbieotim; 2H: and

at; ita unner: noriiomwifiiia pain,- oi aude breaksaawawtheeneelir mtfi'e omewprdjentiomm These breaks take place transversely of the bottom wall 25 and thus elongate slightly the slot 26 in the key. This frees or releases the key from the can cover. The projections remain attached to the can cover. The necks 3| of the projections should be of the proper thinness so that they will easily break and so that undue force will not be required to 'lift the? key handle'. -At the same time when properly made these necks Will hold the key securely in place on the can until it is needed for removal of the ing the can.

tearing strip in openand is discharged to any suitable place of de- In some cases two or more welding projections i may not be required for holding the key in place on the can.

If desired one projection may be used and this may be located at either end of the slot 26 or may be disposed intermediate its-' ends. In any case it is desirable to have the projection or projections of a width substantially 4 that of the slot in order that the connection may constitute aneasily rupturable neck or necks. Furthermore, such construction permits the necks being struck out'ofthe metal usually cut away from the key to provide the slot 26.

.;Figures .7 to illustrate principal parts of a die mechanism for carrying out the steps of the method of making the key from a key blank having the loop handle 22 and the fiat shank section 23 alread formed therein. In such a method of making keys,- the depression 24 and the welding projections 27, 2.8 are simultaneously formed in the key blank. The slot 26 is then'pierced in the bottom wall ofthe depression and this leaves the welding projections in the proper location and in proper condition for the purposes'hereinbefore mentioned. i r

Formingiof the depression 24 and the initial step of forming the welding projections 21, 28 are brought about preferably in a die mechanism including a lower die block 34 (Figs. 7 and 8), which may be stationary, and a cooperating movableupper forming punch 35. The die block is formed with a flat top surface 36 for the reception of the flat section 23 of a key blank and has an elongated, narrow, slot' opening 3! of substantially .thesame length and width as the slot 26, in the key. -Adjacenti this opening twosmall' stepped-recesses4l, 42 of the 'same'size and shape as the welding projections 21, 28 are formed in theudie block. These stepped recesses are disposed at the opposite ends of the slot opening 31, as shown in Fig. 7. The bottom face'of the forming punch 35 is formed or shaped in the configuration of the depression 24.

.Hence when the'flat section 23 of akey blank is placed over the opening 3! in the die block34 and the punch 35 is moved'down, the key blank is reformed into the shape shown in Figs. 'land 8, the: depression 24 and a center part extending between and including the welding projections- 21,28 being-struck-out simultaneously. During this forming operation the downward movement of the punch iscontrolled to obtain the proper thickness of;the bottom wall 25 and the necks 3 that connect the welding projections 27, 28 to the key blank.

. After such a key forming operation, the punch 35 is withdrawn and .a piercing punch 46 (Figs. 9 and 10) is driven. through the reformed key blank to produce the slot 26. Thispunch may be used with the samedie block 34 or with another similar die block to which the reformed key blank is transferred. The piercing punch is of substan tially the same cross-sectional length and width as the slot opening 31 in the die black 34 and posit. This action also completes the formation of the welding projections 21, 28 by cutting the inside wall of each. 15'' 21, 28 withits opposite ends disposed adjacent the projections. This completes the formation of the key which is now ready to :be spot welded or otherwise secured to the can. Since the welding projections are of relatively small size with only a limited contact 'facein engagement with the can cover, the preferred procedure of welding is properlyconcentrated at the-points of contact and the welding of the key is made in a minimum of time and without loss of welding energy.

It is thought that the invention and many of its attendant advantages will be understood from the foregoing description, and it will be apparent that various changes may be made in the form, construction, and arrangement of the parts and that changes maylbe made in the steps of the method described and their order of accomplishment without departing from the spirit and scope of the invention or sacrificing all of itsmaterial advantages, the form hereinbefore described being merely a preferred embodiment thereof.

I claim: I 1

1. A tearing strip can opening key designed to be attached to a can by welding, said key comprising a shank having'a' handle at one end and an elongated depression having a relatively thin bottom wall formed in the other end, a slot in said bottom wall, and a a welding projection formed integral with jection adapted to be welded to acan and to be separatedfrom said [bottom wall when the key handle is lifted to release the key. I

2. A tearing strip can opening key designed to be attached to a can 'by welding, said key com-'- prising a shank having a handle at one end and an elongated slot in the other end, a depression surrounding said slot, said depression having a relatively thin bottom wall, a'nda welding projection formed integral with said bottom wall and located contiguous an end of said slot, said bottom wall being adapted to rupture when the key handle is lifted to release the key from the projection. a

3. A tearing strip can opening key adapted to welded to a can, said key having a slot formed be in one end, a depression formed in said key contiguous said slotysaid depression having a relatively thin when-the key is lifted the bottom wall of the depression will rupture to release the key.

4. A tearing strip can openingkey designed to !be attached to a can by welding; said key come prising ashank having a handle at one end and,

said bottom wall, said pro-" bottom wall,-and a welding projection formed integral with said bottom wall, whereby 5 6 adapted to rupture when the key handle is lifted Number Name Date to release the key from the projection. 1,669,833 McCOll May 15, 1928 GEORGE P. ZIEHMER, JR. 1,743,519 Bardet et a1 Jan. 14, 1930 1,823,068 Stollberg Sept. 15, 1931 REFERENCES CITED 5 1,884,683 Hermani Oct. 25, 1932 The following references are of record in the 1'936611 Young 1933 fil of t t t: 7 Young Jan- 16, 1,985,864 Kronquest Dec. 25, 1934 UNITED STATES PATENTS 2,102,467 Ljungstromr Dec. 14, 1937 Number Name Date O'Brien Dec. 30, 2,305,091 Kronquest Dec. 15, 1942 670,168 Zimmerman et a1. Mar. 19, 1901 1,635,536 Butler July 12, 1927

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