US1464513A

US1464513A - Sheet-handling device

Info

Publication number: US1464513A
Application number: US934749A
Authority: US
Inventors: Jr Damiel M Sutherland
Original assignee: AGASOTE MILLBOARD CO
Current assignee: AGASOTE MILLBOARD CO
Priority date: 1919-10-31
Filing date: 1919-10-31
Publication date: 1923-08-14
Anticipated expiration: 1940-08-14

Description

Aug. M, w23. mwm

D. M. SUTHERLAND, JR

SHEET HANDLING DEVICE Filed Oct. 31. l9l9 3 Sheets-Sheet l SWW D. M. SUTHERLAND, JR

Aug. M, w23.

SHEET HANDLING DEVICE Filed Oct. 3l, 1919 3 Sheets-Sheet 2 H mw ww ww MN ww mw m W. W N A MN N\ lhlllnnuhlhuhlll'uuh l I I l NQ w Q m 8 mwww .www m TTORil/E YS Aug. E923.

D. M. SUTHERLAND, JR

SHEET HANDLING DEVICE Filed Oct, 51, 1919 3 Sheets-Sheerl 5 W/T/L'ESSES a gw@ Patented jarig. lffl, w23.

JERSEY.

SEEEHNDLENG .Application filed october Si, i919. Aserial No.

To all 'whom t may concern:

Be it known that l, DANIEL M. Soren LAND, Jr., a subject of the King oil Great Britain, and a resident of Trento-n, county of o Mercer, and State oit New Jersey, have invented certain new and useful Jimprovements in a `Sheetfllandling llevice, of which the Jlollovvi'ng is a speciiicationo n The present invention relates to conveyor il@ mechanism for handling sheets of paper pulp, wood pulp and the like, and particuiarly thick, large sheets of this material. 'lhe principal object of the invention is to provide an improved apparatus 'for trans l@ porting wet sheets ol pulp roin one apparatus to anotherl and to or from a pile of such sheets.

Pulp board sheets are manufactured from pulp byl processes which involve treatment oit @il the sheets successively in diiierent apparatus and the wet sheets must be conveyed from one apparatus to another and at times to and 'from| a pile or" wet sheets. The wet sheets` are difficult to handle without damage 255 because they are fragile and because the skin which forms the surface is soft and easily marked or broken. llt is especially necessary to avoid any damage to the sheet or marring of the surface for board that is y to have a high finish, inasmuch as any surface imperfections are very objectionable and diiiicult to remove.

rThe present invention provides a carrier device particularly designed to handle large sheets of wet pulp without marking the surface of the sheet and without other damage v thereto. While the invention is particularly designed for the. specific use of handling such wet sheets, it is to be understood thatv it may be advantageously applied for handling other articles and sheets or strips of other material and such use is contemplated aswithin the scope of the invention.

The principle of the invention may best 4@ be. understood from the description of an apparatus embodying the same. Such an aparatus is shown in the accompanying draw- 1n s in which `igure lis a side elevation of a sheet carrier constructed in accordance with the invention;

Fig. 2 is a plan view of the carrier table, the supports therefor being shown in section as indicated by the line 2--2 of Fig. l;

Fig., 3 .is view in end elevation al the device as shown in l; i'

Fig. el is a iraentary view showing the position o'E the carrier table wher picking up or depositing a sheet of wet upon pile or such sheets.

rlPhe sheet carrier in its preferred and illustrated forni comprises movable carrier table l, having closely spaced parallel rolls, 2, 2, for supporting the wet sheets, together with an overhead carriage 3 movable upon a suitable track l 'from which carriage the carrier table is suspended. lili-e table is adapted to he raised and lowered relative to the carriage and the carriage is arranged to be moved along the track under the control ot the operator.

'.l` he carrier table comprises suitable trarne having or example supporting yokes, 5, 6, and side bars 7, 8, secured. to 'the yokes. A series ci parallel rolls 2 2, arerotatably mounted in the side bars in closely spaced relation to provide a substantially continuous support for the sheet of wet pulp or other material to be carried. lt is desirable to so shape the ends of the table lthat while a sheet is being picked up or de osited it will not be unduly bent at the e 1'ge ot the table. 7lhis may advantageously be accomplished by making the ends tapered to a relatively thin edge and in the construction illustrated this is done by providing at each end

additional rolls

10, 11, 12, which are of successively smaller diameters, as shown in Figs. 2 and Il. As a result of this expedient,

whenpicking up or depositing'a sheet, the t smaller rolls act as a wedge between the sheet and the table or ile, (see Fig. 4f).

ln operation, the rolls engaging the under surface 'of a sheet being picked. up or deposited, rotate at a peripheral speed suchthat there is no tearing or abrading stress upon the sheet, care being taken that the carrier is at a sulicient height to lift the rolls well above the surface of the next sheet. below, so as to avoid abrading of such sheet. As, however, the carrier is, or may be, slightly tilted when the upper sheet first engages the rolls, and there is, or may be, some danger of having the surface of the next lower sheet abraded by contact with the first three or four rolls, l provide a freely rotatable roll 13, positioned to project slightly below a plane tangent to the lower sie surfaces of the rolls, Such roll supports the

rolls

10, 11 and l2, suoiently to clear the lower sheet,

Suitable gearing is provided for driving the

rolls

10, 11, 12, simultaneously in either direction and at the same peripheral speed. For the purpose ol' illustration, have shown sets of intermeshing gears mounted. upon the ends of the rollshats upon opposite sides of the table Alternate gears 14 on each side are secured to the respective shafts, While the other gears 15 are loosely rotatable upon the shafts and serve merely as idlers, rlhese gears are se driven and so arranged that each roll shaft is driven by a gear 14 secured to one end ithereof'and all of the rolls are positively driven in the same direction. The power for driving these gears maybe supplied as shown by a suitable reversible motor 16 carried in the yolre 5 and connectedas by `sprocket Wheels and a chain 17 to drive a transverse shaft 18 from which in turn the gears 14, 15, are drivenn As shown,

sprocket wheels

19, 20, are secured upon `p osite ends of the shaft 18 and are connectedlby

chains

21, 22, to sprocket wheels, 23, 2d, secured respectively to roll shafts 25, 26., '.lhe fast gears 14: are thus driven all in the same direltion and edect the desired driving of the ro s,

Gearing of the same type may be arranged to drive the smaller rolls 10, l1 and 12, at each end of the carrier but certain complications are introduced by the laster speeds required and by the spacing of the rolls. For this reason l prefer to employ sprocket gearing. The arrangement shown is the same ntor both .sets of smaller rolls. Sprocket wheels are secured to the shafts of the rolls l0, 11 and l2, and to the shaft of the next adjacent roll 2, the several Wheels being ot such relative sizes that the peripheral speed oit all rolls will be the same. 'lhese sprocket wheels are connected

bysproclet chains

28, 29 and 30.

rlhe carriage 3 from which the table is suspended, is mounted to travel upon a suitable overhead track d. This track is shown as consisting of an l-m on the flanges of which run the rollers' or Wheels 33, 3d, rotatably carried on the side bars of the carriage. ln order to control the position of 'the carriage, certain ot the supporting Wheels are driven by a suitable reversible motor. By Way of illustration, the

Wheels

33, 33, are shown as driven from a motor conventionally indicated at 36, by means of a suitable train of gears 37, so arranged that a suitable speed may be obtained. The carrier table 1 may be suspended from the carrie e 3, in any suitable or desirable manner. s shown, guides or guide rods 4:1, d1, depending from the carriage, are loosely received in tubular guides l2, 42, rigidly secured to the beam lll of the carrier table menare frame. The guide rods are prevented from swinging by braces d5. l prefer also to provide sprin -pressed rollers d6 mounted in' the heads d of the guide rods and engaging the under side of the track to prevent lifting of one end of the carrier upon anyv of the table which may occur in the motors are preferably arranged for remote control from a suitable control operating station in a manner Well .lnnown in the art.

ln operation, when it is desired to pick up a sheet of pulp from a table or from a. pile of such sheets, the end or the carrier is in troduced under'the edge of the sheet and the rolls are driven to draw the sheet onto the table. As the rolls are rotated to feed the pulp onto the carrier table, the table itself yis moved bodily forward at a speed corresponding to the surface speed of the rolls so that no tension or compression is exerted upon the sheet of Wet pulp but the carrier picks up the pulp with as little disturbance of the Wet sheet as possible.' 'lhe position of the parts during the pickin up of the sheet is indicated in Fig. l. W en it is desired to deposit a sheet, the operation is reversed and the table is-withdravvn ata speed corresponding to the surface speed of the rolls as driven to deposit the sheet1 l claim:

l. ln an apparatus of the character described, the combination with a carrier table having a plurality of rolls closely spaced to supporta sheet of material and means for driving said rolls, of means for moving said carrier in directions transverse to Vthe axes of said rolls at a speed corresponding to the peripheral speed of the rolls while the vrolls are rotatably driven.

2. ln an apparatus oli. the character described, the combination with a carrier table having a plurality of rolls closely spaced to supmrt a sheet of material, of a carrier from which said table is bodily suspended, said carrier being movable in directions transverse to the axes of said rolls.,

3. ln an apparatus of the characr described, the combination with a carrier table having a plurality of rolls closely s aced to support a sheet of material, the rol s adjacent one edge being of progressively smaller diameter and means for driving said Lemiers rolls at the same eripheral speed, substam tially as describeml 4c., ln an apparatus of the character described, a carrier table having a plurality of rolls closely spaced and of equal size and a smaller roll at one edge to provide in eect a thin edge substantially as and for the purpose described.,

5. ln an apparatus of the character described, the combination with a carrier table having a plurality of rolls closely spaced to support a sheet of material, the rolls adjacent one edge being of progressively smaller diameter and means for driving said rolls at the same peripheral speed, and means for moving said table in directions at right angles to the axes of said rolls at a speed corresponding to the peripheral speed et said rolls.

6. lin an apparatus of the kind described, the combination of an overhead track, a carriage, track engaging wheels on said carriage whereby it is movably mounted on said tracks, means for driving said wheels to actuate said carriage, a carrier-table suspended from said carriage in a manner to permit a rocking movement thereof, a plurality of parallel, closely spaced rolls mounted on said table to form a sheet support, the axes of said rolls extending at right angles to said track and means for driving said rolls.

"5. ln an apparatus of the kind described, the combination of a carrier-table, means movably mounted on Said table for handling material and mechanism for shifting said carrier-table relatively to the material being handled and at a speed corresponding to the handling speed of said movable means.

lin testimony whereof l have hereunto set my handc DANEL M. SUTHERLAND, JR.

yes