US2173852A - Machine for making corrugated paper - Google Patents

Description

Sept. 26, 1939. c. D. MILLER 2,173,852

MACHINE FOR MAKING CORRUGATED PAPER Filed March 10, 193'? 2 Sheets-Sheet 1 Tiq. 1. I

Char/es 0. Mil/er ATTORNEYS Sept. 26, 1939.

c. D. MILLER MACHINE FOR MAKING CORRUGATED PAPER 2 Sheets-Sheet 2 Filed March 10, l937- mv Cho ENTOR r/es D. M/Her M W ATTORNEYS Z8 Fig.5. 631; 1/ c 54 e4 Patented Sept. 26, 1939 UNITED STATES PATENT oer-ice mcnmr. FOR MAKING oomruca'run PAPER Charles D. Miller, Huntington Park, Calif. Application March 10, 1937, Serial No. 121995 13 Claims. (Cl. 154-31) 5 chine for making corrugated paper, which is structurally and functidnally characterized to obviate the necessity for using steam,'water or other agent to soften the paper stock, thereby eliminating all extraneous apparatus otherwise v a corrugated paper making machine of the above 25 described character which is of compact con-' struction requiring but a small area of floor space in comparison to that required for machines of similar capacity as at present constructed; which is of much less weight as compared to machines 3 now in use, to the end of obtaining a very considerable saving in power and operating costs; and which facilitates assembly and disassembly so as to permit profitable shipment of a machine and paper stock to various market centers rather 85 than to ship from a central manufacturing point to such market centers .the completed product which is extremely bulky in proportion to its weight. a

A further object of theinvention is to provide 40 a corrugating mechanism including a corrugating'roll with which an endless corrugating web co-acts to form the corrugations in the paper stock, and is constructed in a novel manner obviating any flexural stresses on the corrugating elements composing the web', which elements are so interconnected as to effectively prevent misalignment of the elements and whipping of the web when in motion, all to the end of greatly prolonging the useful life of the web by re- 50 ducing fatiguing stresses thereon to a negligible minimum.

With these and other objects in view, the 111- vention consists in" the combinations, arrangements and functional relationships of elements Q as set forth in the following specification and necessary when a stock softening process is.

particularly pointed out in the appended claims.

In the accompanying drawings, Figure l is a plan view of the machine with a portion of the width of the machine broken away;

Figure 2 .is a view of the machine in side elevation;

Figure 3 is an enlarged-view in side elevation partly broken away, and illustrating the driving mechanism for the corrugating mechanism embodied in the invention;

Figure 4 is an enlarged fragmentary sectional view of a portion of the corrugating mechanism;

Figure 5is an enlarged fragmentary view of the corrugating mechanism in plan and partly in horizontal section;

Figure 6 is a vertical longitudinal sectional view taken on the line 6-45 of Figure 5; e

Figure 7 is a vertical transverse sectional vie taken on the line 1-1 of Figure 3; r I Figure '8 is a fragmentary perspective-view showing a portion of'sthe -corrugating web em bodied in the corrugating mechanism.

-Referring specifically to the drawings, the invention comprises agenerally rectangular frame F. including longitudinal side members l0lll' and suitably arranged transverse members ll rigidly connecting the side members'together in spaced parallelism' Bearings 12 and I3 are provided on the side members Ill to removably receive and rotatably mount rolls M and ii of paper. between. the members III, as shown in Figure 2.

Paper from the roll I4 is trained about an idler roll it journaled in bearings I '|-l I fixed to identical housings l8-l8 secured by bolts I9 on the side members I!) at one end ,of the frame F.

Journaled respectively in guide blocks 2|) and 2| are trunnions 22 and 23 of rolls 24 and 25 about which is trained an endless corrugating web designated generally at C, the guide blocks.

being freely movable in guides 26 and 21, (Figure 3), in the housings l8, to the end that the rolls and web will be yieldingly urged downwardly under the action of gravity to a position definitely limited by the bottoms of the guides.

Journaled in the housings [8 by trunnions 28 is a corrug'ating roll 29 which is disposed directly paper I5 is trained for application to the sheet following corrugating of the latter and the application of an adhesive thereto.

Intermediate the web mounting rolls 24 and 25 and the rolls 29 and 32 are smooth surfaced rolls 34 and 35, the former of which is disposed between the stretches of the endless corrugating web C and is provided with trunnions 36 journaled in guideblocks 31 freely slidable vertically in guides 38 in the housings l8.

The roll which is directly below the roll 34 and is provided with trunnions 39 journaled in the housings l8, constitutes a doctor roll to which adhesive is supplied from a pickup roll 40 disposed directly below the roll 34 and provided with trunnions 4i by which it is also journaled in the housings l8.

The roll 40 is immersed in a body of liquid adhesive contained in a suitable tank 42 supported between the housings l8 and having a'fiat top wall 43 slotted to expose the uppermost portion of the doctor roll 35 and extending in opposite directions to the uppermost portions of the rolls 29 and 32, to the end of providing a platform on which the corrugated sheet 36 rides during travel from the corrugating roll 29 to the roll 32. That portion of the top wall 43 between the doctor roll 35 and the roll 32 is cut away except for a number of widely spaced longitudinally extending narrow strips or ribs 43a which provide sufficient support for the corrugated sheet until the facing sheet 33 is applied thereto, and avoid the wiping oil of any appreciable amount of adhesive from the corrugations as applied thereto by the doctor roll.

Liquid adhesive can be supplied to the. tank 42 through a filling opening 420, and excess adhesive is removed from the doctor roll 35 by a scraper 44,

One of the trunnions 39 of the doctor roll 35 is extended from therespective housing l8 and has fixed thereto a drive pulley 45 adapted to be connected by a belt 46 to a suitable source of power (not shown) to rotate the pulley in the direction of the arrow in Figure 2. a

Fixed to the trunnions 39 within the respective spectively: to the trunnions of the rolls 29 and 32.

Other gears 5|, 52 and 53 fixed to the trunnions disposed in heating plates 58 and 59 over which the facing sheet 33 rides from an idler roll 69, prior and subsequent to its application to the corrugated sheet 36, are adapted to .be supplied with current from a suitable source (not shown). The completed-product is supported by an apron 6| and is adapted to be wound into a roll 62,

which can be frictionally driven by mechanism not shown and forming no part of the present invention, to take up the completed product in synchronism with the operation of the machine.

The endless corrugating web 0 is composed of a multiplicity of round rods 63 of uniform exwith the mounting rolls 24 and 25 and are pivotally connected at their ends by links 64-64 in spaced parallel relationship corresponding to the pitch of the longitudinally extending corrugating ribs or teeth 65 on the corrugating roll 29.

Identical connectors K in the form of rigid rectangular plates 66 having sleeves 61-6| receiving the rods 63, hingedly connect adjacent rods at intervals along their lengths as shownparticularly in Figures 4, 5 and 8. The connectors K are in staggered relationship along the lengths of the rods, and the sleeves of one connector are in end abutting relationship to the sleeves of other connectors so as to have the effect of continuous sleeves on the rods, throughout the length thereof between the links 64, for meshing relationship of the sleeves with the ribs 65 of the corrugating roll 29. v

At their opposite ends the rolls 24 and 25 are provided with teeth 68 and 69, respectively, which intermesh with the sleeves 61 of adjacent connectors K along the length of the corrugating web, so

that the web will be positively driven at the same these teeth is less than that of a connector as shown, for example, in Figure '7.

The rolls 24 and 25 are peripherally polygonal between the teeth 68 so as toprovide flat bearing surfaees for the plates 66 of the connectors, and it will be noted from Figure 4 that the teeth 68 are recessed or cupped so as not to interfere with the corrugating ribs 65, and that the plates 68 are tangentially related to the peripheries of rods 63 for the same reason. I

The operation of the invention is as follows:

With power supplied to the pulley 45, and the sheets 30 and 33 fed into the machine, as shown. in Figures 2 and 6, the weight of the corrugated web C and the rolls' 24, 25 and 34 is imposed under the action of gravity upon the respective rolls 29, 32 and 35, to the end that the sleeves 61" of the connectors K will co-act with the bs 65 of the corrugating roll 29 in corrugatin e sheet 30, which is then confined by the sleeves and the wall 43 of the tank 42, in corrugated form for the application of adhesive to the tip portions only of the corrugations by the doctor roll 35. The sheet 30 is maintained in its corrugated form by the wall 43 and the sleeves 61 until the facing sheet 33 is applied to the adhesive bearing portions of the sheet 30. It will be appreciated that by dividing the heating of the facing sheets into two applications immediately prior and subsequent to the application of the facing sheet to the corrugated sheet, that maximum speed in drying the adhesive is obtained without destroying its adhesiveness before the facing sheet is applied. As a result, the output of the machine can be materially increased while insuring that the facing sheet will not. separate from the corrugated sheet because of ineflicient bonding or wet adhesive. V

The vertical adjustability of the corrugating web C provides the necessary pressure to insure eflicient corrugating, adhesive applying, and facing sheet applying operations at a maximum speed while compensating for variations in the thickness of paper stock, as well as preventing damage to the machine should a foreign bod enter between any of the mating rolls,

By the above described specific construction of corrugating web, the wear thereon is reduced to a minimum, and such fiexural stresses as would cause fatigue are avoided. It will be appreciated that the rigid connectors K hingedly interconnecting all the rods 63 by means of the insure that they will be maintained in rectilinear form and in parallelism for accurate corrugating co-action of th sleeves 61 with the ribs 65 of the corrugating roll 29. The connectors rigidly tie adjacent rods in definite spaced relationship corresponding to the pitch of the ribs 65 and yet are free for hinging movements relative to the rods without setting up any injurious stresses.

Furthermore, should any connector or rod become .defectiveor in any way unfit for use, the-substitution of new parts can beeconomically eiiected with ease and dispatch.

It will also be clear that by applying adhesive only to the tip portions of the corrugations of the sheet 30, a considerable saving in adhesive is efiected without sacrificing the emciency with which the sheets are bonded together, as adhesive applied to any other location on the sheets would be wasted.

What is claimed is:

1. In a corrugating machine, a corrugating roll mounted for rotation; an endless corrugating web mounted for movement and co-actionwith the roll in corrugating sheet stock between the roll and web; said web comprising a multiplicity of rods; and means providing linked connections between the rods; said means including rigid connectors hingedly connecting adjacent rods in parallelism at intervals along the lengths thereof and having corrugating die surfaces concentric with the axes of the rods for corrugating co-action directly with the corrugations of said roll when the machine is in operation.

2. In a corrugating machine, a corrugating roll mounted for rotation; an endless corrugating web mounted for movement and co-action with the roll in corrugating sheet stock between the roll and web; said web comprising a multiplicity of rods; links at the ends of the rods pivotally connecting themin spaced parallelism to provide a 4 predetermined width of web; and plates having sleeves hingedly connecting adjacent rods at intervals along the lengths thereof to maintain the rods in rectilinear form and in parallelism against whipping motion when the web is in operation.

- 3. In a corrugating machine, a corrugating roll mounted for rotation; an endless corrugating web mounted for movement and cot-action with the roll in corrugating sheet stock between the roll and web; said web comprising a multiplicity of rods; links at the ends of the rods pivotally connecting them in spaced parallelism to provide a predetermined width of web; and plates having sleeves hingedly connecting adjacent rods at intervals along the lengths thereof to maintain the rods in rectilinear form and in parallelism against whipping motion when the web is in operation, the plates beingin staggered relationship along the lengths of the rods, and the sleeves being coextensive in length with the plates so that the sleeves of one plate are in end abutting relationship to the sleeves of other plates, whereby to. have the effect of continuous sleeves along the lengths of the rods for co-action with the corrugating roll.

4. In a corrusating machine, a corrugating roll molmted for rotation; an endless corrugating web mounted for movement and co-action with the roll in corrugating sheet stock between the roll and web; said ,web comprising a multiplicity of rods; links at the ends of the rods pivotally connecting them in spaced parallelism to provide a predetermined width of web; and plates having sleeves hingedly'connecting adjacent rods at intervals along the lengths thereof to maintain the rods in rectilinear form and in parallelism against whipping motion when the web is in operation. the plates being in staggered relationship'along the lengths of the rods, and" the sleeves being co-extensive in length with the plates so that the sleeves of one plate are in end abutting relation-'- ship to the sleeves of other plates, whereby to have the effect of continuous sleeves along the lengths of the rods for co-action with the cormgatin'g roll, said plates being in'tangentialrelationship to the peripheries of the rods on which the sleeves of the respective plates are mounted so as to permit unrestricted corrugating co-action of the sleeves with the corrugations of said roll.

5. In a corrugating machine,-a corrugati'ng roll mounted for rotation; an endless corrugating web mounted for movement and co-action with the roll in corrugating sheet stock between the roll and web; said web comprising a multiplicity'of rods; and means providing linked connections between the rods; said means including a multiplicity of rigid connectors having sleeve portions receiving adjacent rods and arranged to interconnect all rods hingedly in spaced parallelism throughout their lengths, the peripheries of said sleeve portions providing corrugating dies intermeshing directly, with the corrugations of said roll when the machine is in operation.

6. In a corrugating machine, a corrugating roll mounted for rotation; an endless corrugating web mounted for movement and co-action with the roll in corrugating sheet stock between the roll and web; said web comprising a multiplicity of rods; links at the ends of'the rods pivotally connectirig them in spaced parallelism to provide a predetermined width of web; and a multiplicity of rigid connectors having sleeve portions receiving adjacent rods with the connectors disposed in staggered relationship along the lengths of the rods, and with the sleeve portions of one con nector in end abutting relationship to the sleeves of other connectors, whereby to have the effect of continuous uniform-diametered sleeves along the lengths of the rods adapted for corrugating coaction with said roll.

7. In a corrugating machine, a corrugating roll mounted for rotatioman endless corrugating web; rolls about which the web is trained, for co-action with the corrugating roll in corrugatin'g, sheet stock between the latter and web; said web comprising a multiplicity of rods; links pivotally connecting the rods at their ends in spaced parallelism so as to provide a predetermined width of web; flat connector plates having sleeves hingedly con-. necting adjacent rods at intervals along the lengths thereof to maintain the rods in rectilinear form and in parallelism; the web mounting rolls being polygonal peripherally to define flat surfaces with which said plates have flat bearing contact; and driving connections between the web mounting rolls and the web.

8. In acorrugating machine, a corrugating roll mounted for rotation; ,an endless corrugating web;

web; flat connector plates having sleeves hingedly connecting adjacent rods at intervals along the lengths thereof to maintain the rods in rectilinear form and in parallelism; the web mounting rolls being polygonal peripherally to define flat surfaces with which said plates have flat bearing sheet stock between the web and corrugating roll;

rolls intermediate the web mounting rolls and disposed one above the other to co-act in confining one stretch of the web and the corrugated sheet therebetween; means for supplying an adhesive to the lower one of said intermediate rolls to be transferred thereby to the corrugations of the sheet; and a roll co-aoting with the other web mounting roll to apply a facing sheet to the adhesive bearing portions of the corrugated sheet.

10. In a corrugating machine, an endless cormgating'web comprising a multiplicity of rods; and means providing linked connections between .the rods to connect them in parallelism; said means including rigid connectors having corrugationforming peripheral surfaces concentric with the axes of the rods and adapted to intermesh with corrugations of a mating corrugating element.

11. In a co'rrugatingmachine, an endless corrugating web comprising a multiplicity of rods;

links pivotally connecting the rods at their ends sleeves hingedly connecting adjacent rods at intervals along the lengths thereof to maintain the rods in rectilinear form. and in parallelism throughout their lengths, the platesbeing in staggered relationship along the lengths of the rods, and the sleeves beingco-extensive in length with the plates so that the sleeves of one plate are' in end abutting relationship to the sleeves of the other plates, whereby to have the effect of continuous sleeves along the lengths of the rods.

13. In a corrugating machine, an endless corrugating web comprising a multiplicity of rods; links pivotally connecting the rods at their ends in parallelism; and rigid connectors having sleeve portions receiving adjacent rods and arranged to interconnect all rods hingedly between the links in order to maintain the.rods in rectilinear form and in parallelism. Y

CHARLEYSDMILLER.

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