US1793629A - Strip-corrugating machine - Google Patents

Description

Feb. 24-, 1931. D. MEISELBACH 1,793,629

' STRIP CORRUGATING MACHINE Filed Nov. 1. 1928 4 Sheets-Sheet 1 Feb. 24, 1931. A. D. MEISELBACH 1,793,629

STRIP CORRUGATING MACHINE Filed Nov. 1. 1928 4 Sheets-Sheet 3 3 lnueWZ/ @wzzzm zewm Feb. 24, 1931. A. D. MEISELBACH' 3 5 STRIP CORRUGATING MACHINE I Filed Nov'. 1. 1928 4 Sheets-Sheet 4 Patented Feb. 24, 1931 UMTED stares rarest: "orsrcsof AuUs'r i); ME sELB oH,

orcrrronoo, ILLiNoIs, ASSIGNOR OF ONE-HALFTOWILLIAM J. saunsnne, or ourcaeo, rumors a sritrr-connuearme' MACHINE Application filed November 1, 1928. se l No. 316,397. 1 f

V This invention relates to novel means for producing a corrugated thin metal strip, and

has special reference to. improved means and methods forproducing strips accurately core rugatedin relatively squarezigzag form for use particularly in producing what are known as punch or sales boards of the kind forming the subject-matter of my United States Letters Patent No. 1,713,293, granted May 14,

1:) 1929.- e In the production of such boards thin sheet metal strips equal in width to the thickness of the board are bent into zigzag form andaplurality of these strips are arranged 1 together to form the board with a large number of relatively small cells or pockets extending through the thickness of the board. It is desirable that the corrugations have rather sharp square bends, and it is the for 29 mationof such-bends in a zigzag strip with which this application has particularly to do. V

In forming the thin metal strips from a fiat condition to the finished igzag corrugated form several steps are necessary, as it has so far appeared to be a physical impossibility to form the square-bend corrugations in one operation with sufiicient rapidity to bring the cost within the allowed limits.

In my novel method I first partly form thecorruga tions, that is, I first form them with rounded tops and bottoms, andrthen in a further-operation I finish the corrugations,

making the tops and bottoms flat and the bends square. "For this last step the-only feasible manner is to press the partly formed strips between two interfitting dies formed to receive the partly formed strip between them and when pressed tightly together form the 5 tops and bottoms of the corrugations-flat and the bends square.

.As these strips have considerable length, sometimes having as'many as one hundred corrugations, and as in order to properly form the corrugations these interfitting dies must fit accurately with only clearance enough between them to receive the metal of the strip, it will be seen that the partly formed strip must accurately agree with the dies-as 59 to pitch of corrugations,.that is, the distance from center to center of the corrugations must be so exactly like the "distance from center to center of the forming projections on the dies that even when a strip with one hundred or more-corrugations. is placed upon on the dies it willlie flat on the lower die and will receive the'projections of the upp'er'die 7 wlthout any undue pressing :ofthemetal at"v the sides jof the pro ections. 1

'Ihis invention-has to do particularly with no,

means for producing the partly formed strip with such accuracy of pitch that the stripfor the last operation. I

The invention will be more readily under stood by reference to the accompanying drawings fornung part of this specification and in which V Fig. 1 is'atopj plan view of'a strip corrugating machinemade in'accordance with my In invention;

. Fig. 2 is a vertical, longitudinal section ontheline22 of Fig.1; Fig. 3 is a fragmentary, vertical, longitudinal section on the line 3-3 of Fig. 1; T-Fr Figs. 4 and 5 are fragmentary, vertical, transverse sections on the lines ll and 5 5 respectively of Fig. 1; c I

Fig. 6 is an' enlarged,fra gmentary, longi tudinal section through; the forming elements similar to Fig. Q-and showing a strip-in process of being formed;

Fig. 7 is a section similar to Fig. 6 but without the strip;

Fig. 8 is a fragmentary, longitudinal" seci tion of a pair of die elements such as are used for the final operation of forming the square corrugations} v Fig. 9 is an enlarged, fragmentary, long-i tudin'al section'of the die'members showing the partly formedst'rip in place on the lower die ready to receive'theupper die for the final will be properly received intheforming dies Fig: 12-.is apersp ective view of astrip Mu 1 and fixed a second toothed rack 9 which also the guide groove 2;

after it has passed through the machine; and Flg. 13 1s a similar view of the strip in finished condition.

The machine shown in Fig. 1 consists of a base 1, provided with a longitudinal guideway 2 1n wh1ch an elongated longitudinally movable member or bar 8 is arranged and the shaft 6 by which the shaft, 6 can be main ually rotated'to rotate the gear owhich in turn moves the bar ,3 along the base through At the other side of the-bar 3 is provided extends the length of the bar 3. This rack as best shownin Figs. 6 and? has teeth 10 formed to cooperate with similar teeth 11 on a pinion 12 to form a thin sheetmetal strip .13 into corrugated form with corrugations 14 having rounded tops -15and similar rounded bottoms 16 when the strips are passedbetween the rackand the pinion, as illus-v trated in Figs2 and 6.

As will be seen from an examination of.

Fig. 7, the teeth of the rack 9 and pinion 12 are formed to provide a space 17 between them of a thicknessto receive the strip 13.

, The strips 13 are out of the width desired and may be formed in any length, though preferably the strips are formed of the length deslred for use 1n making no the sales boards.

The accuracy of thepitch of the corrugations 14 is attained by leaving the pinion 12 loose on the shaft 6 and feeding the rack 9 through in under the pinion 12 by means of the rack 4 and gear 5. In other words, the pinion 12 during the corrugation forming operation merely follows the rack 9 and no pressure. is applied to the strip 13 except merely the corrugation forming pressure. After the strip has thus been partly formed it is laid upon a toothed lower die member 18, as shown in Fig. 9, and a similar upper die member 19 is forced down upon same, as shown in Fig. 10, forming the rounded ended corrugations 1 1 into square corrugations, as

shown at 20, Fig. 10. That is, the rounded tops and bottoms are flattened and the sides of the corrugations are straightenedup, making the square corrugations 20 which are the ultimate object of the invention.

' For the purpose of guiding the strip 13 through the machine during the corrugating operation guide plates 21 and 22 are provided. Plate 21 is-fixed on one side of the machine close to the outer side of the rack 9 and the plate 22 is arranged on the opposite side of the'rack. The plate 22 is carried on a horizontal guide pin 23 which is movable transversely of themachine through a fixed bearing 2%. At opposite-sides of the guide pin 23 the plate 22 carries horizontally projection pins 25 for supporting compression' springs 26 arranged between the bearlng member24e and the plate 22. These springs tend to hold the plate 22 yieldingly against "theadjacent edge-of a strip 13 as it passes through between the plates 21 and22 and 1s being fed between the rack 9 and the pinion 12. These guide plates hold the strip transversely and cause it to be fed straight through the machine. I

In Fig. 11 I have shown'a corner of one of of the corrugated strips 13-laid together so that the square corrugations make square cells or openings 28 in the board. These strips are clamped together between end clamping strips 29 by clamping-bolts'30. It is desired that the corrugations be as squarecornered as possible so that thestrips will properly pack together when vclampedtogether to form aboard, and also so that the pitch of the openings in the board will be uniform for the purpose both of further processes through which the board 1s put in completing it and for use with filling ma-- chines for placing the sales indications in the cells 28.

As many modifications of my-invention.

will readily suggest themselves to one skilled in the art, I do notlimit .or confi ne my inpast the pinion, asecond toothed wheel arranged above the movable member andof,

larger diameter than the pinion, a second rack fixedon the member parallel with the first rackand with which second- I'iLCkTSELld.

second toothed wheel meshes, the second tooth-ed wheel rigidly mountedon said shaft forrotation therewith, and means for rotat-. ing. said shaft. 1 '7 1' 21111 a machine for corrugating strips of sheetmetal, a shaft mounted in-bearings for rotation, a toothed wheel carried by the shaft and freely rotatable thereoma' second toothed wheel carried by the shaft and fixed thereon, a member movable transversely inrelation to the shaft, two toothed racks fixed on said member, one thereof meshing with each of said toothed wheels, and means for rotating said shaft, the. strip to be corrugated being the sales boards 27 made up of a plurality 0 passed between the toothed wheel, which. is

I gitudinally movable member, means for posifreely rotatable on the shaft, and its cooperating rack, the other rack and toothed-wheel being operative to move said member in relation to the shaft.

3. In a machine for corrugating strips of sheet metal, two co-opera ting, intermeshing, toothed members between which the strips are passed to be corrugated, means for positively moving one of said members, the other member being free to follow the positively moved member.

4. In a machine for eorrugating sheetmetal strips, a toothed rotatable member and a oo-operating, intermeshing, toothed, 10ntively moving one of said members, the other member being free to follow the positively moved member.

5. In a machine for corrugating sheetmetal strips, a rotatable toothed member and a co-operating, intermeshing toothed rack,

the strips being adapted to be passed between the co-operating teeth to be corrugated, means for positively moving the rack, the

rotatable toothed member being free to follow the movements of the rack.

In testimony whereof, Ihave hereunto set my hand, this 17th day of October, 1928.

AUGUST D. MEISELBAGH;

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