US1985290A - Tearing strip can - Google Patents

Description

Dec. 25, 1934. HILDEVBRANDT 1,985,290

TEARING STRIP CAN Filed March 18, 1932 INVENTOR M4R0L0 H/Lozamwvor I 1 1m.) ATTORNEY Patented Dec. 25, 1934 'TEARING s'rmfoAN I Harold 'Hildebrandt, Tacoma,- Wash.

Application March 18, 1932, Serial 52 19,711

provide :a tearing strip can that is less expensive,

yet which retains all the advantages of the usual form oftearing strip can and has other :a'dvan- 10; tages in addition'thereto. i

More specifically stated, it is the object of this invention atozprovide a can'in which the "end or closure is hermetically sealed to the body by means of a double .seam, :an'd'wherein a tearing strip is located in the outer layer of thelmetal :of the seam and is removable to detachcthe .end or closure from the can body. Another object oi-the invention is. to provide a strip removing: device of novel form, which :is easily applied, easily used and which will remove the strip without danger of the strip being broken during the removing operation. v :Still another object-of the invention is to'provide for removal of the tearing strip'without 25. leaving any ragged .or sharp edges of metsu .ex-

posedtin such way :that'iniury mightresult to a person in .handlingttheican. Also to 'ieave the cover in condition for use as a temporary reclosure. t t t 7 .Another obj ect ofs'the invention resides *in the particular method of manufacturing this type of tearing strip can. i

v:Other objects of :the invention reside in. the various details of construction 'z-and in the com- 35, bination of. parts and LIHOdB'UfSzODEIQitiOIl; as will hereinafter besfullydescribed.

accomplishing these objects, I'have prothe key winding device to the double seam and to the tearing strip tongue.

Fig. 5 is a plan view showing use of a strip 65 removing device of an alternative type.

Referring more in detail to the drawing- 1 1 design-ates a sheet :metal or ti-n can of I the usual type, having its top end or closure .-2 joined to the body by the usual double seam 3. The

closure, or end 2 has the 1131121 1 countersink forin '5 ing :the vertical wall iiwfitting down within the mouth of the lean body and it :has a peripheral flange portion 3b interfolde'd and fclinohedto'thei can body flange 1a in; the double 'seam. Thisseam, 'in' its formation, is rlolledidown flat, andin 10 the presenti'cnstance has sufficient width that a substantial 'tearing strip may be incorporated therein; t

. "The outer :fold ':or layer of the metal :of ":the double seam directly connects the closure :3 to 15 the can-body, and formed .in this outer iaver; in parallel relation and circumfierentially about the can, are lines ofsco-ringt -A defining the tearing strip;5;,-

"It is preferred that this line scoring bepdone 20 by tsuitablersooring, rolls fincorpotaated in $113 double seaming machine to :operate afteror rdur ing the seam forming operation; However, it :is to beundenstood that the strip scoring operation might be done :at any time'atter the seam was 2 completed and by various kinds of machines:

After the strip 5 has been set off about :thelcan by the scoring ofthe adouble seam, a'ggouge oriother tool .is used-"to break out ;a short; :lengthf of the strip, to fonnacdetachedtongue ias-at-G for at 3 tachment of a winding The provision. of this tongue does not in any wayaffect the intega rity of the :sealcof the double :seam iasits extent istooshontandit is outside "of, the main sealing joint OIJjOiIlbSPIZOVidBd: in the seam. 2' 35 'With the :strip'. s0';-formed andnthe tongue thus provided, it is :possibl-e'to remove the :strip to-des tach the can cover qfrom the body,=;by the usual winding ikey. Howevenas applied to the usual double seam, the tearing strip would be quite har 4,9 now'and might-'bebroken during its removal unlessasome cprecautionor special means was pro? vided to aid the winding key. Therefore, I have provided ca sstriprremoving' device asshownin Figs. 3 and' i whichco-zaots with the'windingkey '45 in :such a manner as to pry the strip loose ascthe key windsin' the-strip. This device zalsoncauses the strip, :as it is removed, to be woundevenly on theikey. t t .z' ,1 Il'his device 'iiiuitspreterred'iorm-consiststoipa so yieldable metal plate folded or bent back on itself as a sort of U -shaped slide having the inner and outer wing portions 10 and 11. The part 10 is provided at its upper and lower longitudinal edges with inturned flanges 12 and 13 adapted,

respectively, when the part 10 is placed flatly against the double seam, to overlie and underlie the seam as a means of guiding the slide in its travel along the seam. At the base of the U- shaped slide is an extended prong 15, substantially the width of the tearing strip and of sufficient length that it may be extended beneath the free end 6 of the strip 5 and in the direction of the strip, to advance between the outer and next adjacent layers of the double seam, as seen in Fig. 4. The outer part 11 of the slide has inturned flanges 16--16 at its upper and lower edges to serve as guiding or retaining means for the coils of the tearing strip as it is wound onto the key.

As seen in Fig. 3, the shank 17a of the winding key 1'7 is extended within the base loop of the U-shaped slide and it has a slot 18 adapted to register with a slot or opening 19 in the base of the slide. When the slide is applied to the double seam, as in Figs. 3 and 4, the tongue 6 of the tearing strip'may then be extended through the registering slots 19 and 18. Then by rotation of the winding key, the tearing strip will be wound onto the key and incident to this, the slide will be advanced in such way as to cause the prong 15 to pry the tearing strip outwardly from between the lines of scoring as an aid to its removal by the winding key. As the strip is wound on the key, the flanges 16 of the plate 11 keep the windings even and one upon the other, thus to avoid any lateral strain on the strip that would be apt to break it. As the windings pile up on the key, the key moves toward the open end of the slide and the opposite side wings 10 and 11 will be forced apart by the gradually increasing size of the core of the strip, thus to automatically take care of this condition.

In Fig. 5 I have shown an alternative means for removing the tearing strip. This consists of a plate 20 with downwardly flanged guide fingers 21 and 22 at its ends for overlying the double seam and with guides 23 and-24 for engaging the outside of the seam. A prong 25 extends from theplate to advance beneath and pry out the tearing strip as the plate is advanced on the seam about the can. A handle portion 26 is provided on the plate to aid in its use. v

The main advantage in the provision of a tearing strip in the double seam, as above described,

resides in the fact that on removal of the strip,

the can body is not shortened orthe cover displaced. Also, no extra metal or part is required for a'contents retaining means to prevent spilling when the strip is removed. Furthermore, the body blank needs no added metal for use as a tearing strip tongue and thus cost of manufacture is reduced because of this saving in material.

Having thus described my invention, what I claim as new therein and desire to secure by Letters Patent is- 1'. A can of the character described having a closure member at one end secured to the body in a double seam; said seam having lines of scoring in the outer fold thereof setting off a continuous tearing strip encircling the can.

2. A can of the character described having a closure member at one end secured to the body in a double seam; said seam having lines of scoring in the outer fold thereof setting off a continuous tearing strip encircling the can, a

portion of the strip being broken loose to provide a tongue for application of a strip removing device.

3. A can of the character described having a countersunk closure fitted within the mouth of the body, and having a flange joined to the body flange in an interfolded seam; the outer layer of the folded seam directly joining the closure to the body flange, and having lines of scoring therein setting off a continuous tearing strip about the can with a portion of said strip broken loose and offset from the seamfor attachment ofa strip removing means.

4. The combination with a can having an en- 'circl ingtearing strip formed with a tongue, of

a strip removing means comprising a slide provided with a prong for advancing beneath the strip and a; winding key associated with the slide to which the tongue may be attached whereby winding of the strip thereon advances the slide along the strip and causes the said prong to advance beneath and break the said strip free from the can.

5. A strip removing means for tearing strip cans comprising a slide mounting a strip winding key; said slide being adapted to advance with the key along the strip in the can wall as the tearing strip is wound from the can onto the key, and a prong extended from the slide for advancement beneath the stripto aid in its removal by the key.

6. The combination with a can having a tearing strip set off in its end seam, of a strip removing means comprising a slide adapted to follow about the can on said'seam,,and having a prong adapted to advance beneath the strip to break it loose from the seam, and a winding key mounted in the slide whereby the said slide will be advanced as the strip is. wound onto the 7. A device as recited in claim 6 wherein the slide has guide flanges for engaging upper and lower edges of the can seam to guide the slide in its travel. v

8. A device as recited in claim 6 wherein the slide embodies means whereby the windingsof the strip onthekey are retained evenly one upon the other.

9. The combination with a can having a closure member'attachedto'the body' by a double seam and having a tearing strip encircling the can in the outer layer of the seam, and formed with a free tongue, ofa strip removing means comprising a slide. of U-shaped form disposed for travel about thecan upon the seam and having spaced fiangesnon. one of the inner wing members for overlying opposite edges of the seam to guide the'slidein itsltravel, a prong extending from the slide Ifo'r advancement beneath the tearing strip, as theslide is advanced, a winding'key revoluble within the base of the slide and having a slot for receiving the strip tongue; the outer wing member of the slide having means for guiding the winding of the strip on the key and. being outwardly yieldable to accommodate an increase in size of the strip coil on the key; said slide being advanced along the seam incident'to winding the strip on the key.

- HAROLD HILDEBRANDT.

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