US1909583A - Apparatus for manufacturing composition board - Google Patents

Description

May 16, 1933. c. E. IVES APPARATUS FOR MANUFACTURING COMPOSITION BOARD Filed Dec. 13, 1930 5 Sheets-Sheet l INVENTOR v C L IFFOPD E II/Ea BY MZZ ATLI'ORNEY May 16, 1933. c. E. IVES APPARATUS FOR MANUFACTURING COMPOSITION BOARD Filed Dec. 15, 1930 3 Sheets $heet 2 QWN WEN

INVENTOR C-L/FFOED E V56. BY 9 A'TTQRNEY7 May 16, 1933. A c. E. IVES 1,909,583 I APPARATUS FOR MANUFACTURING COMPOSITION BOARD Filed Dec. 13, 1930 3 Sheets-Sheet 5 ATTORN EY CLIFFORD E. IVES, OF WILMETTE, ILLINOI III Patented May 16, 1933 PATENT oFFrcE" hairs" s'rA'rEs' S, ASSIGNOR TO UNITED STATES GYPSUIM COMPANY, OF CHICAGO, ILLENOIS, A CORPORATION OF ILLINOIS APPARATUS FOR MANUFACTURING COMPOSITION BOARD Application filed December 13, 1930. Serial No. 502,022.

This invention relates to a composition board and the apparatus for the treatment of the edges of moving strips of sheet material. used in said board, and has reference more particularly to an apparatus of the class described which is suitable for chamfering, scoring and trimming the edges of a paper cover sheet used in the manufacture of gypsum board.

In the manufacture of composition boards such as gypsum boards, in which a plastic material luiving calcined gypsum as its base, is,

introduced between paper cover sheets, it is common practice to fold these sheets about the edges of the board so as to strengthen the same at the edge of the boards and prevent them from being chipped or broken in handling. In order to make boards having rathcrsharp edges, it is customary to score the paper cover sheets longitudinally at the bend line to permit easier bending. It is also customaiy to chamferthe edge of the outermost folds of a paper cover sheet so that the paper will lie flat within the plane of the edge or top surface of the board and present a smooth appearance. It is also desirable that the chamfered edge of the paper be trimmed after chamfering and scoring so that there will be no irregular projections on the chamfered edges.

An object of this invention, therefore, is to produce an apparatus for the combined functions of chamfering, trimming and scoring the edges of the paper cover sheets.

Another object of the invention is to provide a combii'ied chamfering, trimming and scoring appara us which is compact and which has a long life without an undue maintenance cost.

A further objective of the invention is to provide a device of the classdescribed which may be easily adjusted so that it operates accurately upon the edges of the paper cover sheets; also to improve apparatus for the manufacture of composition board in other respects hereinafter specified and claimed.

Reference is to be had to the accompanying drawings forming a part of the spec ncation, in which, V

F 1g. 1 1s a sectional view through one edge of a plaster board which is one type of board which may be made through the use of my improved apparatus, 7 Fig. 2 is a side elevation of the apparatus for making the board shown in Fig. 1, I

Fig. 3 is a sectional elevation through the machine taken on the line 33 of Fig. 4,

Fig. 4 is an elevation, partly in section, of the improved machine looking longitudin ally ofthe board making machine,

Fig. 5 is a sectional elevation through the machine taken on the line 55 of Fig. 2, and Fig. 6 is a sectional elevation through the machine takenon the line 6-6 of Fig.5.

One of the many types of board which can be made by the use of my improved apparatus, is shown in Fig. 1. This board has a lower cover sheet 10 and an upper cover sheet 11, the latter being provided with a longitudinal score mark 12 so that a fold 13 may be turned downwardly and secured to an upwardly extending fold 14 formed on the lower sheet 10. The inner-surface of the fold 13 is provided with a beveled or chamfered surface 15, the outer edge 16 of which is trimmed to a width somewhat less than the thickness of the gypsum board produced. A longitudinal score mark 17 is formed on the upper face of the cover sheet 10 adjacent the fold 14, and said fold 14 may be trimmed to the correct width by an apparatus more fully described in my Patent No. 1,887,307,

dated November 8, 1932. The core material ming of the edge of the paper cover sheet 11.,

The cover sheet 11 in the form of a continuous strip, is unwound from a supply roll not shown, and is passed about a guide roll 20 which is carried on a shaft 21, the latter being'rota-tably mounted in bearings 22 secured to framework 23 of the machine. After leaving the roll 20, the cover sheet 11 passes underneath a pair of grinding or carborundum wheels 24 each of which 1s secured to a shaft 25 having'annular flanges 26 and 48 between each of which the wheels 24: are

clamped by means of a nut 27. The shaft 25 is rotatably mounted in ball bearings 28 and 29 so that the axis of the shaftexit-ends substantially parallel to the edge of the paper strip 11. Bearings and are mounted in the outer wall 80 and the inner wall 81 respectively of a gear case, which is di ided into an upper gear case and a lower case or chamber 38 by means of a partition The gear case nlidably supportc its bottom on a square bar 2-56. in order to maintain the desired position of oaci gear case 82 on bar 86, clamps 37 are provided, which are secured to the bottom of the gear cases and embrace bars 86. Screws 38 engage in suitable, threaded eyes at the adjoining edges of the clamping" members 87 and serve. to draw the clamps tightly about bars 86. Suitable core holes are formed in the walls of the gear case for coring purposes, these holes being normally closed by plugs i0 when the gear case casting is being used.

Azsquare bar 41 extends parallel to and above the bar 36, said bars being connected together and being connected to the frame work 23 by means of a head casting L2. The bar 4-1 receives a V-shaped slide-way li-3 formed in the upper part of the gear case wall. An annular oil. cap is secured to the gear case wall 30 outside the end of shaft 25, by means of bolts 4-5 so as to prevent leakage of oil out of said gear case past said shaft 25. A suitable packing L7 is provided in the gear case wall. 81 about an annular flange 48 so as to prevent leakage of oil past the bearing 29.

A spiral gear 49 is mounted on H e shaft 25 and is secured to said shaft by means of a key 50. A spacer collar 51 extends between the hub of gear 4L9 and the ball bearing 28. while a spacer sleeve extends between the hub of said gear -19 and the ball bearing 29 so as to accurately space said. gear 49 to mesh correctly with a spiral. gear 58 which is socured to a shaft 54 by means of a nut 55 and a key. Pins 56 and 57 extend transversely through the sleeves 51 and 52, respe:tively and through the sl aft 25, said pins sowing to splash the oil up over the operating mech anism.

The shaft 54: has its axis extending vertically and provided with enlarged bearing section 59 which is rotatably received in a bearing 60 formed in the partition 34. The shaft section 59 is provided with suitable spiral oil grooves 61 which serve to continually work the oil upwardly. A small diameter section 62 is formed on the shaft 54; and a worm 63 is keyed to said sh csection 62. A thrust collar 64 is mounted on the shaft section 62 between. the won 1 68 and the hearing 60. A helical gear 66 secured to a horisupported in the walls of the gear case.

Sleeves 70 and 71 on the shaft 67, accurately position the helical gear 66 between bearings 68 and 69, so that said helical gear accurate ly meshes with the worm 63. A scoring wheel 72 and an annular trim mini: knife 73 are secured to one end of the shaft 67 by means of a nut M and spacing collars 75. The scoring wheel 72 is more fully disclosed in my aforesaid copending application.

' The gear meshes with a gear 76 which is mounted upon hollow shaft 77, the latter being rotatably mounted in ball bearings 78 and 79 supported in the walls of the gear case. Collars 80 and 81 are mounted upon the shaft 77 so as to accurately space the" gear '2' 6 as it meshes with the pinion 66. A siaft 88 is concentrically supported within thehollow-shaft 77 and has secured to its outer end an annular trimming knife 84 which overlaps the outer cutting edge of the trimming knife 73, with the chamfered edge of the paper passing between said trimming knives. The shaft 88 is urged to the right, as seen in Fig. 5, by a compression spring 85, so that the trimming knife 84 presses firmly against the trimming knife 73 to give a clean cut. The spring 85 is retained between a stub shaft 86 secured within the outer end of hollow shaft 77 by means of a pin 87, and the end of shaft 8. A transverse slot 88 passes through the shaft 88 and a pin 89 passes through the shaft 77 and the slot 88., being secured to said shaft 77. The pin 89 thuslimits the axial movement of shaft 83 within the hollow shaft 77. Splash arms 89a. are secured to the gear 76 so as to insure a proper lubrication of the operating mechanism.

An idler pressure roller 90 is mounted below the scoring wheel 7 2 so as to press the paper cover sheet- 11 against said scoring wheel. The roller 90 is rotatably mounted upon a spindle 91, which is secured to the outer end of a lever 92, the latter being pivotally mounted on a pivot pin 93 which is secured to the fran'ie-wo-rk of the machine. The lever 92 is prevented from axial movement on the pin 98, by means of a collar 94 having a split pin 95 passing transversely through the collar 94 and the pin 93. In order to accurately adjust the vertical position of the roller 90 so as to obtain the proper depth of score mark I adjust the lever 92 about this pivot pin 93. ilhisadjustment is accomplished by providing a fork 96 on the outer end of lever 92, said fork having a transversely extending recess 97 in its upper surface for receiving a pin 98 which extends transversely through a vertically ex.- tending rod 99. I A compression spring 100 is carried on the rod 99, being confi: ed between a washer 101 bearing against the lower surface of the lever fork 96, and a collar 102 slidably carried on said rod 99. The lower bolts 127.

end of the rod 99 passes through an outstanding flange 103 formed on the split flange 37, and is threaded to receive an adjusting wheel 104. Thus by rotating the adjusting wheel 104, the position of the roller and the depth of the score mark is accurately adjusted.

A pressure roller 105 is secured to a shaft 106 below the chamfering wheel 24 so as to press the paper edge 13 against said wheel. The shaft 106 is arranged to be accurately adjusted vertically so as to get the proper depth of chamfer by the chamfering wheel 24. This adjustment is accomplished by mounting the ends of said shaft 106 in a bearing block 107, said block being slidably received in a slide bracket 108 secured to the gear case, by bolts 109. The lower end of the bearing block 107 is provided with a threaded hole to receive an adjusting screw 11.0 which passes through the slide bracket 108. A gear 111 is'secured to the lower end of each of the screws 110. A stub shaft 112 is rotatably received in the lower wall of the gear case and is provided near its middle with a gear 113 which is positioned between the two gears 111 and meshes therewith. An adjusting wheel 114 is secured to the outer end of stub shaft 112 so that when said adjusting wheel 114 is rotated the vertical position of the pressure roller 105 is accurately adjusted. In order to adjust the position of the two units or machines, one at each edge of the paper cover sheet 11, so as to increase or decrease the distance between them for different widths of board, I provide an ad justing rod 116, which passes through the head castings 42 and is rotatably supported in bearings 117 and 118 formed in said head castings. A spacing collar 119, is mounted on one end of the rod 116, and is secured on said rod by a nut 120 screwed onto a threaded section 121 on said rod 116. An adjusting hand wheel 122 is keyed on the opposite end of the rod 116, being secured thereto by a nut 123 so that axial movement of the rod 116 is prevented. The rod 116 has a threaded section 124 at one end withthreads of one hand and has a similar threaded section near the opposite end with threads of the opposite hand. The threaded section 124 engages an. internally threaded nut bolted into the boss 125 formed in the gear case wall, by means of a flange 126 and tap The threaded section at the other end of rod116 is'threaded into "a nut in a similar boss 125 of the companion unit or machine. wheel 122, the distance between the machines is varied at will.

" also secured to the beams 130 by bolts Thus, by rotating the adjusting I A sleeve 133 is rotatably mounted within the bearing bracket 131, said sleeve being provided with a pair of spaced apart, annular shoulders 134 of smaller diameter upon which are seated ball bearing races 135 which engage with the bracket 131 to rotatably support'said driving sleeve 133. Collars 136 are screwed into the ends of the bearing bracket 131 so as to hold the ball races in position in said bracket.

A pair of co-axially arranged drive shafts. 137 pass through the gear case walls and are, seated in ball bearings 138 and 139 which are supported by said gear case wall. An oil cap 140 adjacent each bearing 139 prevents leakage of oil, and nut 141 is screwed onto the end of the shaft 137 to retain the ball bearing in place. A helical gear 142 is keyed to an enlarged section 143 of the shaft 137, being suitably spaced by collars 144 and 145 between the bearings 139 and 138 respectively. Thi helical gear 142 meshes with the helical gear 49 so that the drive shaft 137 causes the rotation of the shaft 25 with its associated mechanisms. Each of the shafts 137 has a square end 146 which is slidably received inside of the similarly shaped bushing 147. This bushing has an annular exterior shape and is forced into place inside of the sleeve 133 and then brazed, so as to secure a driving connection between the square shaft 146 and the sleeve 133. A pulley 148 is keyed onto one end of the sleeve 133, and is connected by one or more belts 149 to a pulley 150 secured to the motor shaft 151 by a nut 152.

The grinding wheel 24 is enclosed by a casing 154 except for an opening 155 which is arranged for clearance to permit the passage of the strip of paper 11. An opening 155a is provided in the upper part of the casing'154 and is closed with a cover 156 held in place by a bolt 157 so that the grinding wheel 24 may be dressed and so that inspection and cleaning of the case 154 is pos sible. A circular cover 158 is bolted by bolts 159 to the exterior face of the case 154 so that the grinding wheel 24 may be inserted in said case. An air outlet flange 160 is formed on.

the top of the case 154 and is connected by a duct 162 to an exhaust fan not shown, which is adapted to remove the particles of paper resulting from the chamfering of the paper cover sheets 11. Suitable blades or fan arms 163 are attached to the flange 48 so as to rotate with the shaft 25 and prevent any accumulation of the particles of paper within the chamber 154.

An oil filling plug 165 is screwed into the top of the gear case and a tube 166 extends upwardly ,from the gear case partition 34 being provided with an oil outlet opening 167 so as to maintain a constant level of oil above the partition 34. An oil outlet pipe 168 passes through the gear case wall and has an arm 169 extending downwardly to prevent dirt getting into the gear case and maintain a constant level of oil above the gear case bottom 170. The mechanism inside the gear case is thus supplied with suficient lubrication.

As the paper strip 11 passes from between the trimming knives 73 and 84:, it passes outwardly, over a guide roller 171 and then around a large roller 172 which reverses the direction of movement of the strip 11. The paper strip 11 then contacts with a pair of folding brackets 173 having folding recesses 17 i gradually tapering along an elongated lower flange 17 5 of said brackets. The recesses 17 1 accomplish the downward folding of the fold 13 to engage an upturned fold let of the lower cover sheet 10. One of the folding brackets 173 is provided with an upper integral collar 175a which is threaded internally to receive a threaded section 176 formed on an adjusting rod 177 which extends transversely of the board making machine. A similar, but opposite hand threaded section 178 is formed near the opposite end of rod 17 7 for the purpose of receiving the companion folding device. Bearing collars 17 9 are formed integrally in the frame members 23, said collars being shaped to receive bushings 180 held in place by set screws 181. These bushings 180 rotatably receive the ends of the adjusting rod 177 which has smaller diameter sections 182 for engagement with the inside of said bushings. An adjusting hand Wheel 183 is secured to one end of a rod section 182 by a nut 18 1, so that the adjusting rod 177 is prevented from axial movement by engagement of the ends of bushing 180 with the hub of hand wheel 183 on one side, and the shoulder of the threaded section 178 on the other side.

A sprocket pinion 186 is secured to the outer end of stub shaft 86, said pinion being connected'by a chain 187 to a sprocket wheel 188 secured to the end of shaft 106. The roller 105 is thus caused to rotate at substantially the speed. of the paper strip 11.

In operation, the paper cover sheet 11 passes around roll 20 and between the grinding wheel 24 and the pressure roll 105, to form the chamfered edge 15. The chamfered edge then passes between scoring wheel 72 and pressure roller which form the score mark 12, and also passes between trimming wheels 73 and 84 which trim the chamfered edge straight. The paper strip 11 then passes over roller 171 and around the large roller 172 to engage with the folding recesses 17 1 of the folding brackets 1.73 which turn the folr s 13 downwardly after receiving the plastic core material 18.

The rotation of the grinding wheel 24 is accomplished by means of a motor 129 which is connected by belts 14-9 on pulley 150. with a pulley 1 18 on driving sleeve 133, the lat 141-6. Gear 142 meshes with gear 19 on shaft 25 on which the grinding wheel 24 is secured. To drive the shaft 67 upon which the scorin saw 72 and trimming knife 73 are secured, a gear 53 meshes with the gear 49, said gear 53 being secured on vertical shaft 54 and 59. form 63 is secured to the lower section 62 of shaft 59 and meshes with a gear 66 se-.

cured to the shaft 67. A trimming wheel 84; is mounted upon shaft 83 which is driven by gear 76 meshing with the gear 66.

Roller 90 is rotatably supported on the end of lever 92 which is pivotally mounted on pin 93, the exact height of roller 90 and depth of score mark 12 being accurately adjusted by means of a hand wheel104: operat ing on the end of lever 92. Pressure roller 105 is driven by a chain 187 connecting stub shaft 86 with the shaft 106 carrying said roller 105. Shaft 106 is supported in an adjustable bearing block 107 whose vertical height is adjusted by rotating the adjusting wheel 114:. The distance between folding devices 173 may be accurately adjusted by retating the h and wheel 183, and the exact distance between the two companion units may be adjusted by adjusting hand wheel 122.

I would state in conclusion that while the illustrated example constituted a practical embodiment of my invention, I do not wish to limit myself precisely to these details, since manifestly, the same may be considerably varied without departing from the spirit of the invention as defined in the appended claims.

Having thus described my invention, 1 claim as new and desire to secure by Letters Patent:

1. In a strip treating machine, means for continuously moving a strip of material, a grinding wheel positioned adjacent anedge of said material with the axis of said wheel parallel to said strip of material, a roller pr sitioned below the edge of said material adj acent said Wheel and adapted to press said material against said wheel, and means for adjusting the distance between said wheel and said roller.

2. In a machine for treating the edges of moving strip material, a chamfering wheel having its axis parallel to'said strip of material and adapted to act on the edge of said strip to chamfer the same, and a scoring wheel adapted to form a score mark adjacent said chamfer-ed edge.

3. In a machine for treating the edges of strip material. a chamfering wheel having its axis substantially parallel with the edge of said strip, said wheel being adapted to act ice on said edge to chamfer the same, and means for trimming said chamfered edge.

e. In a machine for treating the edges of a moving strip 01" sheet material, a chamfering wheel contacting with the edge of said strip and arranged with its axis substantially 7 parallel with said edge, means for trimming said chamfered edge, and means for forming a score mark in said strip adjacent said chamfered edge.

5. In a machine for treating the edges of a moving strip of sheet material, a treating machine positioned adjacent each edge of said strip, a chamfering wheel associated with each unit and adapted to chamfer each edge of said strip, an adjusting rod being adapted to be rotated to vary the distance between said machines.

6. In a machine for treating the edge of a moving strip of material, a chamfering wheel positioned adjacent an edge of said strip with its axis parallel to said strip and adapted to chamfer the same, a housing partially inclosing said wheel, and suction means for withdrawing from said housing particles of said strip removed by said chamfering whee 7. In a machine for treating the edges of a moving strip of material, a chamfering wheel positioned adjacent each edge of said strip and adapted to chamfer the edges there of, and means common to both wheels for altering the distance between said chainfering wheels.

8. In a strip treating machine, a chamfer ing and scoring wheel adjacent an edge of said strip to chamfer the edge thereof, means for trimming the chamfered edges, and means for varying the distance between said chamfering and trimn'ring units.

9. In a strip treating machine, a ohamfering and scoring wheel positioned adjacent each edge of said strip so as to accomplish the chamfering and scoring of said edges,

' and means for varying the distance between said chamfering and scoring means.

10. In a machine for treating the edge of a moving strip of sheet material, a chamfering and scoring wheel adjacent an edge of said material and adapted to accomplish the chamtering and scoring of said edge, pressure rollers under the edge of said material and adapted to press said material against said chamifering and scoring wheel, and an inter-connecting drive between said rollers.

11. In a machine for treating the edges of a moving strip of material, a treating machine including a chamfering, scoring and trimming wheel adjacent an edge of said strip material, and driving means associated with said machine and adapted to accomplish the rotation of said wheels.

12. In a machine for treating the edge of a moving strip of material, a frame means, a plurality of horizontal slide bars in spaced,

parallel relation and supported by said frame means, and an edge treating machine supported by said slide bars and adapted to be adjusted axially of said bars.

13. In a treating machine for treating the edges of a moving strip of material, a chamfering wheel positioned adjacent an edge of said strip, a shaft supporting said chamfering wheel, with its axis parallel to said strip, a plurality of bearing blocks rotatably supporting said shaft, means for causing the r0- tation of said shaft and wheel, and means for adjusting the position of said bearing blocks relative to said edge.

14. In a machine for treating the edges of a moving strip of material, means for chamfering and scoring each edge of said material, folding means adjacent each edge of said material and adapted to form a fold about the score mark formed by said scoring wheel, and means common to both of said folding means for adjustably varying the distance between said folding means.

In a machine for treating an edge of a moving strip of material, a rotatably mounted wheel adapted to engage the edge of said strip to treat the same, a lever pivotally mounted below said edge, a roller rotatably mounted upon said lever and adapted to press said edge against said treating wheel, and means for varying the distance between said treating wheel and said roller by rocking said lever about the fulcrum thereof.

16. In a machine for treating the edges of a moving strip of material, a chamfering wheel and a scoring wheel rotatably mounted adjacent an edge of said material, means for rotating said chamfering wheel, and intermediate gearing between said chamfering wheel and scoring wheel for accomplishing the rotation of said scoring wheel.

17. In a machine for treating the edges of a moving strip of material, a treating machine including an edge chamfering, scoring and trimming means operatively positioned adjacent an edge of said strip material and combined as a unit driven from a single source of power.

- CLIFFORD E. IVES.

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