US2576281A - Corrugating machine - Google Patents

Description

NOV. 27, A J, CARR CORRUGAT-ING MACHINE Filed June 9, 1950 INVENTOR. fla 0/5/05 (39mm Patented Nov. 27, 1951 WED ES PATENT OFFICE CORRUGATIN G MACHINE Aloysius J. Carr; Knightstown, Ind.

Application-lune 9, 1950, S'erial'No. 167,128 (01. 154-40) 10 Claims.

5 The" present invention relates to improvementsinndrives" for the corrugating rolls of machines forforming corrugated board.

In the present commercial type" of corrugated machines there is provideda pair of corrugating rolls between-which the paperstock is fed'for the purpose of forming corrugations therein and in addition thereto a pressure roll between which and one-of the corrugatingj rolls is fed the liner, which liner has previously had glue applied to its contact face.

In commercial practice one of the corrugating rolls i's, as a rule, driven from-the other corrugating roll in order that they may be driven in timed relation to one another and" in order that the corrugations of one roll may fit between the corrugations. of the other roll.

Great difficulty has been experienced in drivingthese rolls at relatively high speed even though'the rolls may be driven by intermeshing gears at both ends of the rolls. Due to irregularity in the teeth of the gears, the necessarily lost motion between the teeth of one set of gears and the teeth of the other set of gears the corrugations may not always center and as a result there is a tendency to cut the stock or cause high and" low corrugations in the stock. Furthermore such a drive will not compensate for difierenc'es in the thickness of the stock fed to the rolls.

It is one of the objects of the present invention'to provide a drive from one corrugating' roll to the other wherein lost motion between the gears maybe compensated for.

Another object of my. invention isto provide a drive wherein there is no twisting torque imposed upon the shaft of the driven roll which torque would. necessarily twist the corrugations and prevent them from centering.

' Other objects and features of the invention will beset forth more fully hereinafter in the specifications.

For the purpose of disclosing the invention I have illustrated, more or less diagrammatically, an embodiment of'the invention in the accompanying drawings in which Fig. 1 isa side elevation of the necessary elements of a corrugating machine for the purpose of illustrating my invention.

Fig. 2 is an end view thereof.

Fig. 3 is a sectional view of the connection between the driven gear and driven shaft of the driven corrugated roll.

Fig. 4 is an end view of said connection.

In anembodiment of the invention illustrated there is provided a center corrugating roll I mounted on a suitable shaft II. This roll is driven through the medium of driving chains l2 connecting sprockets E3 on the shaft II with sprockets M on a driving shaft I5; The drivin 2 shaft I5 is driven from a suitable motor through a difierential reduction gear unit It.

Cooperating with the center corrugating roll I0 is a top corrugatingroll I! and likewise cooperating with the center corrugating roll is a pressure roll l8.

In the operation of so much of the structure as has been described the paper to be corrugated is fed from the corrugated stock r011 I'9 over an idler 20" and thence over the top corrugating roll and between the top corrugating roll and the center corrugating r011 Ill. The paper then passes between the center corrugating roll I!) and the pressure roll [8. At the same time liner stock is fed from a liner stock roll 2! between the pressure roll and the center corrugating roll, this liner stock having been previously coated on its contact face with anadhesive.

ihe drive between the center corrugati'ng roll [6' and the top corrugating, rolll i1 consists of two pairs of driving gears 22 and 23.v The gear 22. is fixed on. the shaft I I. and is adapted to mesh with. the. gear 23 which in turn drives the shaft 9134.. This gear 23, however, on its outer face is provided with a pair of lugs 24 and secured to the shaft 25 of the top corrugating roll i1. is a. driving head 26-. This head- 26 is provided with flattened surfaces as at 21. On each of these surfaces is formed a pair of lugs 28 which receive between the same the lugs 24. Interposed between thelugs 2s and the lugs 28 are coil springs 29-29 which at one end bear on circular bosses 30 on the lugs 24 and at the opposite ends bear on washers 3| mounted on screws or. bolts 32 extending through the lugs 28.

I thus provide a. resilient connection between each of the gears 23 and the shaft 25' to thereby compensate for irregularities in the drive between the gears 22 and the gears 23'. This resilient connection also permits a certain relative compensating movement between the top corrugated roll I!- and. its shaft 25 whereby irregularities in the thickness of the corrugating stock may be compensated for.

It is obvious that instead of the gears 22- and 23 sprockets may be substituted therefor, the sprockets being connected by a. driving chain.

7 It) will also be understood that the difierential gearing drive unit [6 provides a compensating means for accommodating irregularities in the oppositedriving connection between the shaft Hiand the shaft H.-

The invention claimed is:

l, A corrugating: machine comprising in combination, a pair of corrugating" rolls have interdigitating; corrugating ribs, means for driving one of said: rolls: and means for driving: the other of said rolls from. the first roll; including a resili 3 ent driving connection between said driven roll and its driving member.

2. A corrugating machine comprising in combination, a pair of corrugating rolls mounted on shafts having their axes parallel and having interdigitating corrugating ribs,'means for driving the shaft of one of'said rolls and means for driving the shaft of other of said rolls from the shaft of the first roll including a pair of members drivingly connected and drivingly connected to their respective shafts, the driving connection between one of said rolls and its shaft including a resilient coupling between its driving member and the shaft.

3. A corrugating machine comprising in combination, a pair of corrugating rolls mounted on shafts having their axes parallel and having interdigitating corrugating ribs, means for driving the shaft of one of said rolls including a differential gearing, a pair of shafts driven thereby and a driving connection between each of said shafts and the opposite ends of the shaft of said roll, the drive between said roll and the second roll including a driving connection between the opposite ends of the shafts of said rolls and including a resilient driving connection between the driven member of said driven roll and its shaft.

4. A corrugating machine comprising in combination, a pair of corrugating rolls mounted on shafts having their axes parallel and having interdigitating corrugating ribs, means for driving one of said rolls from the other including a driving connection at each end of the rolls between the shaft of the driving roll and the shaft of the driven roll, and a resilient coupling between the driven member and the driven shaft of the driven roll.

5. A corrugating machine comprising in combination, a pair of corrugating rolls mounted on shafts having their axes parallel and having interdigitating corrugating ribs, driving members connected to the shaft of one of said rolls at the opposite ends of said roll, driven means resiliently connected to the shaft of the other of said rolls and disposed at opposite ends of said rolls, and a driving connection between said driving means and said driven means.

6. A corrugating machine comprising in combination, a pair of corrugating rolls mounted on shafts having their axes parallel and having interdigitating corrugating ribs, driving members mounted on the shafts of one of said rolls, driven members mounted on the shafts of the other of said rolls, and means for connecting said driven members respectively with the shaft of aid second mentioned roll including a lug on the face of said driven members respectively, a driving head mounted on the shaft of said driven roll and a pair of lugs on said pulley receiving between them said first mentioned lug, and a pair of springs interposed between the opposite faces of said first mentioned lug and the opposed faces of said second mentioned lugs.

7. A corrugating machine comprising in combination, a pair of parallel shafts, a corrugating roll mounted on each of said shafts, each roll having axially disposed corrugating ribs on the periphery thereof, said rollers being spaced to cause the ribs of one roll to intermesh with the ribs of the other roll; means for positively driving each end of the shaft of the first roll and a driving connection between each end of the shaft of the first roll with each end of the shaft of a second roll, including a driven member at 4. each end of the shaft of the second roll, and a driving connection between each end of the shaft of the first roll with each of the driven members and a resilient connection between said driven means and the shaft of the second roll effective in either rotative direction.

8. A corrugating machine comprising in combination, a pair of parallel shafts, a corrugated roll mounted on each of said shafts, each roll having axially disposed corrugating ribs on the periphery thereof, said rolls being spaced to cause the ribs of one roll to intermesh with the ribs of the other roll; a driving shaft for driving a first roll, a differential drive for driving the opposite ends of said shaft, driving means between the opposite ends of said shaft and the opposite ends of the shaft of the first roll; a

driving connection between each end of the shaft of said first roll and each end of a second roll,

including a driven member at each end of the shaft of the second roll, a driving connection between each end of the shaft of the first roll and each of the driven members, and a resilient connection effective in either rotative direction between the driven members of each end of the .second roll shaft and'each end ofthe second ing shaft; a drive connection between each end of said driving shaft with each end of the shaft of a first roll, a driving connection between each end of said first roll and each end of said second roll, including a driven member at each end of said second roll and driving means between each of said driven members and each end of the shaft of said first roll, and a resilient driving connection between each of said driven members with the ends of the shaft of said second roll. 10. A corrugating machine comprising in com-' bination, a driving shaft, a differential gearing for driving the opposite ends of said driving shaft, a pair of parallel shafts, a corrugating roll mounted on each of said shafts, each having axially disposed corrugating ribs on the periphery thereof, said rolls being spaced to cause the ribs of one roll to intermesh with the ribs of the other roll; a driven member at each end of the second shaft; a driving gear rotatably mounted on each end of said secondshaft, each of said members having spaced apart stops and each of said gears having axially disposed lugs; coiled springs disposed between said lugs and said stopsin a driving gear at each end of the first shaft intermeshing with the gears on the opposite ends of the second shaft.

. ALOYSIUS J. CARR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 383,618 Byllesby May 29, 1888 2,022,082 Fischer et al. Nov. 26, 1935 FOREIGN PATENTS 7 Number Country Date 31,254 Austria Dec. 27,

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