US1430418A

US1430418A - Stone press roll

Info

Publication number: US1430418A
Authority: US
Publication date: 1922-09-26
Anticipated expiration: 1939-09-26

Description

l llll II J. W. VEDDER.

STONE PRESS ROLL.

AUG.30,1921.

PatentedSept. 26, 1922.

APPLICATION FILED Patented Sept. 26, 1922.

UNITED; STATES PATENT OFFICE.

STONE PRESS vIEI'OII'JL.

Application filed August 30, 1921. Serial 110. 496,820.

To all whom it may concern:

Be it known that I, JOHN WARREN VED- DER, a citizen of the United States, and resident of Worcester, Massachusetts, have invented new and useful Improvements in Stone Press Rolls, which invention is fully set forth in the following specification.

This invention relates to rolls for paper making and especially to stone press-rolls by which the paper is pressed after it leaves the couch-rolls in paper making machines. Generally the object is to provide means, which may be effectivelyapplied with facility and minimum effort, for mounting and securing the stone-body portion of stone-rollsupon the metal shaft thereof.

It has been heretofore proposed to employ at each end of the stone-body portion of a stone-roll a bushing closely fitting and making rotatable screw-threaded engagement with the metal shaft of the roll, said bushing being exteriorly tapered to fit the correspondingly flaring or countersunk outer end of the bore of the stone-body. In the use of such means the bushin must be rotated so that by its screw-threaded engagement with the shaft it will be moved along the latter into engagement with the stone-body. It has been found that'the attainment of a tight fit with such means requires much effort and care because of the difficulty of rotating the bushin while its exterior surface is in contact with the opposing stone surface of the bore of the stone-body, the stone surface gripping the metal surface and opposing rotation of the bushing just as a piece of emery cloth gripped around the cylindrical surface of a piece of metal opposes rotation of the latter. Hence a further object of this invention is to provide a bushing adapted to be positioned tightly in place between the metal shaft and the stone-body with approximately no relative rotation of the two, but by movement of the bushing longitudinally of the shaft and stone-body.

A further object is the provision of a nonrotating bushing which 'by its movement longitudinally .of the shaft in positioning the bushing willbe caused to expand into tight engagement with the inner surface of the end of the bore of the stone-body portion of the roll; and this object is preferably attained by the cooperationof a tapered surface on the shaft with an interiorly tapered bore of the bushing, whereby as the bushing is moved longitudinally of the axis of the shaft it will be caused to expand in the bore of the stone-body. A further object is the provision of a sleeve or ring in screw-threaded engagement with the shaft adapted to engage the end of the bushing in assisting in forcing the same to, and in securing it in, its final position. A still further object is the provision of a collar adapted to be screw-threaded on to said sleeve or ring after the latter has been put in place, said collar having an inner surface shaped to closely lit the end face of the stone-body, such arrangement permitting positioning of the collar in contact with the stone-body independently of the positioning of the bushing in engagement therewith.

The aforesaid and other objects and advantages are attained bythe present invention, what Lnow regard as the preferred embodiment of which is illustrated in the accompanying drawing wherein-- 7 Fig.1 is a view partly in longitudinal section and partly in elevation, and

Figs. 2 and 3 are end and side elevations respectively-of the expansible bushing such as interposed between the shaft and the stone-body at each end of the latter.

Referring to the drawing, 5 is the stonebody portion of the roll formed with an axial bore, aportion 6 of said bore at each end of the st0ne-body being preferably of slightly larger uniform diameter throughout than the middle section of the bore. A metal shaft 7, preferably tubular, extends through the bore of the stone body and projects at both ends to constitute bearings on the roll adapted to engage suitable supporting bearings not shown. Since the drawing illustrates similar means at both ends of the stone-body for mounting and securing the same upon the shaft, description of such means at one end of the roll only will suffice. Shaft 7 is formed with an exteriorly screwthreaded section or part 8 and adjacent thereto toward themiddle of the shaft with a tapered section or part 9. 10 is a bushing of uniform exterior diameter normally slightly smaller than the interior diameter of the end section 6 of the bore of the stone body portion 5, and having a tapering bore forming an interior surface conforming to the taper of the part 9 of the shaft. The bushing 10 is formed with three longitudinal slots spaced equidistant around and cut through the wall of the bushing, the slot 11 extending the full length of the bushing,

while the ot 12 ezytends'from the left, hand end tovvit in 'a short distance of the right hand end of the bushing, and the slot'1'3 extends from a i ght hand-end: qw thia short distance of the left hand end of the bushing By such slotting the bushing. is

' rendered expansible. 14 is a ring or sleeve interiorly screw-threalded for engagement with the threaded part 80f the shaft, and

also exteriorly so'rew-threaded for engage: mentby-the interior screw-threads of a collar315, the inner face of which'is shaped to conform to the end-surface of the stone-body with which it engages. i a Y asembling the parts thebushin' 10 is fi'rst putin place by forcing it longitudinally along-the tapered part 9 ofth'e shaft until the reiiufilting expansion of the bushing brings its exterior surface into tight engage ment 'with the interior surface ofjthe end portion 60f the bore of the stone-body 5.

'uch longitudinal'movement ofbushing 10 maybe -efiect'edby hammering, or by rotating ebllar 14 against the end of the bushin or by both such methods, the collar 14; when set tightly against the end of the bushing also serving to secure the bushingin the de- Sl-IBdwPOSitlOIl. It will be [noted that in so positioning the bushing 10no rotationthereof'is required and thus avoid the diiheulty and effort experienced with bushings which must be rotated and in Whichthe friction and gripping action between the opb'sing and contacting surfaces of stone-b" yand metal bushing must be overcome to bring the bushing to the "desired position. A pin 16 may: be employed to secure collar 14 against rotation after it has been tightly set against the end of the bushing Collar 15 is next applied and rotated until its inner face is tightly set ageing the endsurface of thestone-body. A pin 17ma y be then'put plane to lock the collar against rotation. WhatIolaim-is:---

1. In roll, the combination of a stone body havingg a central bore, a metal shaft extending through said borefiandprojectin'g at both ends of the stone body to constitute bearings on the roll -for;engagement with supporting bearings and means securing said stonebody upon said shaft: said means including-at one or both endsof the roll a bushing or sleeve on the shaftfitting in the e'ndof the boreof the stone body member and having an exterior surface adapted to tightly engage the opposing surface of said bore. and said bushing having. an interior surface. adapted 'to"closely fit the opposing surface of theishaftmember, the o'pposing 1 60 surfaces of I said bushing andL-of onezpf said members being correspondingly tapered and said.- bushing being movable longitudinally ofr the shaft without rotary; movement relative tolthe sto'ne body in bringing thebushtorits position between: thei shaft 2 and body havin stone bod and,. meansj e" 'n the, shaft mu ida riid to be broeh i iifi d nga'gement with" the end of the bus ing without engaging the stone to secure-the bushing in place.

2. In. a roll, the combination of a stone a central bore, a metal shaft extending through said bore and projecting at both ends of the stone body to constitute bearings on th'e roll for engagement with supporting bearings, and means securing said stone upon said shaft said means including-intone or both ends of the rollii bushing or sleeve on the shaft fitting in the end "of the h re of the stonebody member and having an exterior surface 'adapt'ed to tightly engage the opposing surface of said bore and said bushing having an interior surface adaptedto 'closely fit the opposing tending through said bore and projecting at a both ends ofethe stone body to constitute hearings on the roll forengagement with supporting bearings, and means*securing said stone bod-y upon said shaft said neans including at one or both ends 'of the roll an eipi'xiisible bushing or sleeve on the shaft fitting in the end of the bore of the stone body member and having an exterior surface adapted toti htly engage {the opposing surface of sai bore and said bushing havinganinterior surface adapted to closelyfit the opposing surface of the shaftmernber, the opposing sun-faces of saidbushing and one said members "being cor-respondinglytapered and said bushi'n being movable longitudinally of the shaft without rotary movement relative to 't he stdne body in bringing and expanding the bushing. to

position between the shaft and stone body.

4:. In a roll, thecombinationof a stone'body having a central bore, a metal shaft extendin' throi'tgh 'said'bofe "and projectin at both encs of the stone body to; constitute bearings on the roll for engagement withsu-pportin bearings,v and means securing stone upon said shaft said mean including at one or both ends of the roll an expansiblebushing-or sleeve on the shaft fitting in the end "of the bore of the stone body: member and having an exterior surface adapted to tightly engage theyoppos ing surface of said bore and said bushing having an interiorly tapered surface adapted to fit and cooperate with a correspondingly tapered surface on the shaft whereby said bushing by longitudinal non-rotary movement relative to the stone body may be moved and expanded to its position between the shaft and stone body.

5. In a roll, the combination of a stone body having a central bore, a metal shaft extending through said bore and projecting at both ends of the stone body to constitute bearings on the roll for engagement with supporting bearings, and means securing said stone body upon said shaft said means including at one or both ends of the roll an expansible bushing or sleeve on the shaft fitting in the end of the bore of the stone body member and having an exterior surface of aproximately uniform diameter throughout adapted to tightly engage a corresponding opposing surface of said bore and said bushin having an interiorly tapered surface adapted to fit and cooperate with a correspondingly tapered surface on the shaft whereby said bushing by longitudinal non-rotary movement relative to the stone body may be moved and expanded to its 1position between the shaft and the stone boc y. i

6. In a roll, the combination of a stone body having a central bore, a metal shaft extending through said bore and projecting at both ends of the stone body to constitute bearings on the roll for engagement with supporting bearings, and means securing said stone body upon said shaft said means including at one or both ends of the roll an expansible bushing or sleeve on the shaft fitting in the end of the bore of the stone body member and having an exterior surface adapted to tightly engage the opposing surface of said bore and said bushing having an interiorly tapered surface adapted to lit and cooperate with a correspondingly tapered surface on the shaft whereby said bushing by longitudinal non-rotary movement relative to the stone body may be moved and expanded to its face ing the stone body to secure the bushing in place.

7. In a roll, the'combination of a stone body having a central bore a metal shaft extending through said bore and projecting at both ends of the stone body to constitute bearings on the roll for engagement with supporting bearings,- and means securing said stone body upon said shaft said means including at one or both ends of the roll an expansible bushing or sleeve on the shaft fitting in the end of the bore of the stone body member and having an exterior surface adapted to tightly engage the opposing surof said here and said bushing having an interiorly tapered surface adapted to fit and cooperate with a correspondingly tapered surface on the shaft whereby said. bushing by longitudinal non-rotary movement relative to the stone body may be moved and expanded to its position between the shaft and stone body, a ring screwthreaded on the shaft and adapted to be broughtinto engagement with the end of the bushing without engaging the stone body to secure the bushing in place, and a collar making screw-threaded engagement with the exterior surface of said ring and adaptcd to engage the end surface of said stone body.

8. In a roll, the combination of a stone body having a central bore, a shaft extending through said bore, an expansible bushing surrounding the shaft and adapted to be positioned in the end of the bore of the stone body, and means acting upon longitudinal movement of the bushing relative to the shaft and stone body and without rotary movement of the bushing to expand the same into tight engagement with the surrounding wall of the bore of the stone body.

In testimony whereof I have signed this specification.

JOHN WARREN VEDDER.