US1529534A - Metal-scoring machine - Google Patents

Description

March 10, 1925. 1,529,534

F. ADAMS METAL SCORING MACH'INE Filed Aug. 3, 1923 6 Sheets-Sheet 1 FIG]. ,5. ,1

mas. TH

Match 10. 1925.

- 1,529,534 F. E. ADAMS METAL SCORING MACHINE Filed Aug. 5, 1923 6 Sheets-Sheet 2 fuveraf Ada/I l March 10, 1925. 1,529,534

' F. E. ADAMS METAL SCORING MACHINE 'lno'emior' Adams March 10.1925. 7 f f 1,529,534

- v F. E. ADAMS METAL sconnqe MACHINE Filed AuE'. 192s 6 vS heets-Shget 4 4 Ada Ind wwz I March 10, 1925.

F. E. ADAMS METAL SCORING MACHINE e sheets-sheet 5 Filed Aug. 1923 4 22 m 74-: fol 7Q? A clalzza 71179 March '10, 1925.

F. E. ADAMS METAL SCORING MACHINE Filed Aug. 3. 1923 6 Sheets-sheaf 6 far/r2270 Patented Mar. 10, 1925.

UNITED sT T s PATENT oFFiciz.

FRANK EDWARD ADAMS, OF LOWER BEBINGTON, ENGLAND.

METAL-SCORING, MACHINE.

Application filed August3, 1923. Serial No. 555,424.

or sealed sheet or thinmetal boxes and tins,

and means for opening them of the kind, more particularly, wherein a portion of the body, or a strip forming a p'art of' same, is provided with a series of indentations,

' scorings, or the like in lines of angular disposition, or of an angular and non angular disposition, and in some cases these indenta tions, scorings or the like may be in duplicate and parallel, one set on each side of a central line and band of metal to betorn.

off. The object of such indentations, scorings, or the like is to weaken the metal in the direction of tearing, and in the tearing or severing action to cause the edges of the strip or band to more or lessfollow predetermined paths. i

The invention has for its object and effect 'to generally provide improvements in connection with such machines by which the work is effected more rapidly, and better, and'the machine itself is improved both in durability and in general effectiveness of its operation.

The invention will be described with the aid of the accompanying drawings, which illustrate it.

The invention is illustrated in the annexed drawings, in which Figure 1 shows a sheet of metal, which is to be formed into a can, provided With the scorings or indentations above referred to.

Figure 2 is a side elevationshowing part of the machine, Figure 8 is aview showing the opposite side of it, and Figure 4 is an end elevation of the machine.

Figure 5 is a front elevation, Figure-6 a side elevation in section, and Figures 7 and 8 are views showing details, of a modified form of machine, adapted to operate upon a plurality of sheets at the same time.

Referring to the drawings, 1 is the sheet of tin or metal which is to form the body of the box, and 3 is the band of indentations or scorings effected in the machine,

consisting oftwo parallel lines-andtwo sets two. U V A tongue- 4 of metal is provided on "one g i two edges of the sheet which of inclined diverging lines within the other are to be joined together, and vwill project 7 from the finished can, andby engaging it with a suitable instrument] and turning it round, the band within the outer scored lines will tear" clean away, so that the upper part ofthe can is severed from the lower part; and in the act, if-either of the tear- .ings of the, band comes inward from the upper and lower parallel rings of scorings, the tearing isjled back to same by the'in clined,scorings, and thus faulty tearing is obviat'ed. I

The anvil on which, the sheets rest and are scored is designated 6, and'the sheets are conveyed by an endless. chainconveyor 7, with projections 8 on it, to and over the anv l, and such chain being passed overv suitable sprocket wheels 9 at the ends of the table-10, along which they are slid,and one of which will be rotated step by step rapidly soas to move the sheet the required distance to receive the blows of the tools at a fresh point for each blow,'as hereafter described.

Referring more particularly to Figures 2 to 4, 13 is the frame or head of the machine on which the'scoring tools are carried, 18 are the tools, and 19 is the tool holder proper fixed to a slide plate 20, which slides in guides 22011 the head 13, and is vibrated rapidly up and down.

The tool box 19 is secured to theplate 20 by stud bolts 23 which pass through slots in the box, and screw into the plate 20; and the vertical adjustment of the tool box is secured by screws 24 screwing into a crosshead 25 on the plate 20.

The tools 18 are adjustable vertically by vertical screw studs 26 screwing through the top of the box 19, and horizontally by studs 27 screwing through the sides of the box, and pressing on the sides of the tools 18, of which there are four, one for each row of scorings, the lower portion of the tools being supported laterally by inward projections 29 on the inside of the box 19.

The tools are held in the box 19 sideways, that is on the outside, by a clamping plate Some of the tools may have heads on their tops which touch each other, and they all markings to be made on the sheet at one edge by the tools, the markings being scorings of very shallow depth, say about 1/1000ths of an inch deep. This light scoring will be also applied to the edge of the sheet or the tongue 4. To give these faint markings the tools are so set in relation to the anvil on which the sheet is scored, that they will at the end of their stroke, indent the sheet to the degree specified.

In Figure 1 it will be seen that the deeper scorings only commence on the sheet some distance from one edge; and that the faint scorings extend between the deeper ones and the edge of the plate. This is efi'ected by mechanism above described.

Referring now to the modified machine shown in Figures 5 to 8, in this case, the method of operating is to press the sheet on to the tools, which are stationary, and so effect the scorings, instead of pressing the tools on to the sheet as it moves over a stationary anvil or support.

The frame or part 13 on which the stationary tool boxes are mounted, is mounted in a bed 14, over which the chain 7 is passed, the sheets sliding on the inner ledges of the support rails 10.

The tools are carried in their tool boxes 19, and adjusted therein similarly as described with reference to Figures 1 to 4, but as stated, the anvils 6 are rapidly vibrated; and in this casethey consist each of a bar, either round or other shape in the form of a ram, and supported and guided in a cylinder 16 fixed on to the frame plate 13; and the ram is moved up by the intervention of the insertion device 43, which is moved up and down by the lever 42, similarly as the part 43 in Figures 2 to 4. The lever or arm 42 is rocked about its supporting shaft by a connecting rod or link 41 from the crank shaft 39, and crank 40.

It is important that there be no elasticities or spring in this mechanism, in order that the depth of scoring be permanent, regular and as required; and in order that it may have this quality, the upward movement of the ram 6 is positively limited and stopped when it has moved the required amount, and this is simply and advantageously efiected by providing the ram with a collar or enlarged head 17, the upper annular face of which comes in contact with the lower face of the guide cylinder 16, and so determines and assures the length of the stroke with absolute precision, and therefore the depth and quality of the scorings is continuously determined and assured.

In this modified machine, to produce the intermittence of the scoring action of the tools when the sheet passes from them, or before it has left them so as to leave a nonscored or faintly marked portion as above described, the wheel 62 is placed on the sheet feeding side of the centre of the tools as shown in Figure 5 (also in Figure 1); and the part of the ram 17 which is equivalent to the part in Figures, 2 to 4, is of different depths over its face, (or the part of the face which the end of the inserting bar device 43 acts upon), and this bar is pulled slightly away as shown in dotted lines in Figure 8, when it is desired the tools areto score faintly.

Instead of the end part 45 of the ram being stepped as shown, it may be curved or inclined, so that the faint scoring may be produced.

The link 48'which is connected with the part 43 and operates it, is actuated through a lever 46 which is pulled by a spring '46" at the required time by a cam 57 on the cam shaft 54; and when the rams are not to receive their full stroke, as when the roller 62 is off the sheet, or no sheet is in, the bar 48 is lowered through the link 68, when its outer end will be away from the head of the lever 6, which normally it will be against when the tools are effecting the full scoring; and thereupon the spring 47 instantly pulls the lever 45 away from the deeper portion of the head 45, so that the full stroke of the part 43 will not be imparted to the ram 6.

When this takes place the cam 53 comes into action, and also moves the head of the lever 46 back; and then when the sheet comes over the anvil, and under the roller 62, the link 48 will be pulled up, and the spring 46 will move the lower part of the lever 46 to the cam body, and so the head will press the bar and part 43 into this normal scoring po sition.

In this case, the sheets are supported by one rail 10 at one side, and the ram at the other,- while-the chain 7 is supported by a longitudinal rail 2.

The chain 7, and sprocket wheel 9, over which it passes at the delivery end, will be operated by palls 30 and eccentrics 31 on a shaft 58, from the main shaft 39 through gearing; and this shaft drives the cam shaft 54 at the required reduced speed through a train of toothed wheels 69, which say gives a reduction of to 1; but this speed may be varied according to requirements.

What is claimed is 1. A method of providing a tearable band in metal sheets adapted for the formation of cans or the like, consisting in moving a sheet step by step between a tool and an anvil and subjecting the sheet to rapid blows of the tool to thereby indent the sheet throughout with a series of indentations arranged in alignment to provide a separable section in such sheet.

2. A method of providing a tearable band in metal sheets for the formation of cans,

consisting in feeding the sheet relative to a tool and an anvil and inducing relativemovement between the tool .and anvil to-successively indent the sheet in a series of aligned indentations to provide a band in thesheet having weakened lines oi connection with the sheet throughout its length.

3. A method of providing a tearable band in metal sheets for the formation of cans, consisting in feeding the sheet relative to a tool and an anvil and inducing relative movement betweenthe tool and anvil to successively indent the sheet in a .series of aligned indentationsthe relative movement between the tool and anvil being variable,

whereby to provide a band having lines of separation from the sheet witlisuch vlinesiof varying strengths of connection with the sheet. V

4. A-imethod of providinga tearab'le band 10 in metal sheets adapted for the formation of cans, consisting in feeding the sheet in a step by step movement between a tool and an anvil and inducingrelative movement between the tool and anvil ateach step movement oi": the sheet, with such relative movements between the tool and anvil varying at different points of travel of the sheet to thereby form in the sheet a series 10f successive indentations varying in depth to :thereby provide a band which is separable from thesheet along predetermined lines of varying weakness.

.5. A machine for providing a tearable band in plates or sheets for cans for containing'goods, comprising tools andananvil, be-

tween which the sheets or plates are passed and operated upon by the tools, a contact device operated by the sheets or plates in their travel, means for vibrating the tools Or 40 the anvil; and a movable part controlled by the contact device between the vibrating means andthe anvil, whereby the scoringor indenting efieet is regulated or controlled;

substantially as set forth.

'6. In a machine for providing a tearable f band in sheets adapted for formingcana an anvil over which a sheet is PTOgI'QSS lVGl-Y fed,

tool box, means for moving the tool box and anvil relative to eachother and to the sheet, and a plurality oi tools arranged in said tool. boxto operate on the sheet in the relative movement ot'thetool box and .anvil to form in the sheeta series oit' indentations defining a tearable band. 1

1 In a -.machine for providing a v.tear'ahle wand insheets adapted for forming cans, an

anvil. over which, a sheet isnprogressively fed,

a tool box, means for moving the toolbox and anvil relative to each other and to the sheet, a plurality of tools arranged .in said tool box to operate -;on the sheet IlI1-:-tl16 rela tive .moveinent ofthe toolbox and anvil to form in the sheet a series of indentations-defining a tearable band and-means whereby the tools may be independently adjusted in the tool. box.

8. A machine fox-providing a tearable band in sheets, comprising a plurality of indenting tools, an anvil for the'sh'eet, 1ne ans for inducing a relative movement betweenv the anvil and tools, means for feeding-the sheet in a step bystep movement relative to theanvil and tools, and means whereinthe relative operative movement between the tools and anvil is rigidly :limited :toavoid. elasticity in the action.

In testimony whereof name to this specificationinithe presence of two subscribing witnesses.

FRANK EDWARD ADAMS. \Vitnesses:

Srnnaienv MARGARET -DONALDSQN, MAY GINSBURG'.

I have signed any 7

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