US2816400A

US2816400A - Skiving apparatus

Info

Publication number: US2816400A
Application number: US501698A
Authority: US
Inventors: Joseph T Yovanovich
Original assignee: Paper Res & Dev Corp
Current assignee: Paper Res & Dev Corp; Paper Research & Development Corp
Priority date: 1955-04-15
Filing date: 1955-04-15
Publication date: 1957-12-17
Anticipated expiration: 1974-12-17

Description

J. T. YovANovlcH 2,816,400

SKIVING APPARATUS 3 Sheets-Sheet 1 Dec. 17, 1957 Filed April 15,' 1955 Dec. 17, 1957 J. T. YOVANOVICH SKIVING APPARATUS 3 Sheets-Sheet 2 INVENTOR.

JOSEPH T. YOVANOVICH ATTORNEYS Filed April 15, 1955 Dec. 17, 1957 J. T. YovANovlcH SKIVING APPARATUS 5 Sheets-Sheet 3 Filed April 15, 1955 FIG. 5.

IN V EN TOR.

ATTORNEYS United States Patent O "ice SKLVINGAPPARATUS'.

Josephj'lf. Yc'ivamoviclr, -R'sernont, "'Pa'f, assigner; to` 'Pp'er Researclrtwf. Development .`2Corporati0n,'f Philadelphia, Paiyaa corpb'l'ationi of Pennsylvania Appli'cai'iirAprilllS,1955,'Serial N.,501,'698 v -8 iClaimsx. (CL' 51--1-81'7):A

This. inventioirirelates.' to 'skivinglfapparatus sand, more particularly; .t'on apparatus lfor;l skivin'gx. onvbeveling the edges of ammzingsstrip. offmaterial such as,:for.- example, paper.

-Inzatheiepasrf skivirig4 apparatusi'fhasxbeen: provided: fin

which: abrasive A.vi/heels `havingifeitherr` cylinfdri'cally or conically formed surfaces iare :Lniountedxiwith theirlaxes 4of rotation extendingftransverselyofuthe strip-.t'ovbeskived and'positionedwith at.; leastf' a'.vp'ortionjontlreiriz abrasive surfaee: engagingoan 'edge portion.. .ofi the@ strip. Upontrotaionof the'abrasive'surfacQ-i a portion rofitiieiedge. ofi. the

stripL isfr'enroved'fand withiproperriclearances.:h'eirgumainytai'ned@l'xtweerli ythe' rotating:abrasive` surfacefiand'satsupporting means fior. =the1f strip being rskivedi'a. .beveledmr fathened=edge1is produc'ed'on thestrip.

Operation off. the above noted types 'ofi apparatusi isattended with.'the.difiibu'lty-foffinaintainingsprop'erly formed `'conicalL abrasive surfaces;- `or of 'maintaining "the .proper v angular relation:v betweenffa cylindricalzsurface andV 'a supportingifmember.A which/serves.to'positionfthe strip being Y skivedi inv f order thatr the'.y 'desiredl amount ofi` rriateriah is removed'.` from': thestrip f in "order to .produce ithe beveled or feathered edge soughtiaite'r:

It? is the'.#principali7V object' of fthe presentA invention-:tto provide ani improved Jarrangementlfori providing a :beveled orfeathere'd edge on a Strip off novingin'i'aterialiwhiolr ."ir'rclu'desf a .rotating cylindricala. abrasivefsurface .having :its artist-of. rotation positioned atan ncutesangle ft'of direction of tra'velfofthe* stripyfthe' widthof contactrontherstripsand vthezfabrasive cylindrical: surface being', selected fto'V produce albevelfrex-tencling over' Ia desired.portionfothe' Widthiof i,

theflapparatu'sf showniin iFigureZ with a portionof the i apparatus':removed therefrom;

Figureu4 is afragrnentary vertical sectionthroughxthe apparatus takenfon. the trace 4'-4 ysh'owninlv'liguiferBriand Figure'fis a .perspective ofia portion'ofithesapparatus shown' iii :Figure-i4.'

Asy shown' in Figure 1,'the. apparatus includes asupporting-framework 2V on# the top of iavhich-isv mounted skiv'ing1apparatus' `indicated- .generally ati 3 "in llffigl'ire' w1 whichfwill behereirafter described in detail; Horiiontallyl extending framing 4 is supported by the framework 1 Tand` supp'drtslat itslright-hand end, as'viewed in yFigure 1 `a disc -6 and a lhub' 8 fon= which is wound a -stripi'of 'n'iate'ialllI vto beiskivedzf Thehub' 8is mounted lonja shaftfli)` which is? in turn rotatably supported-v by' means 99a .bearin'g structure114=from the'.iframing;.4. Suitable i;

2,816,400 yPatented Dec.

2. meansFincluding-a discrlsmaybe:provided to secure 'tlievhub Sand `'discitiJonth'e shaft" 10 inf any conventional manner. Afbrake 16 is preferably provided on the shaft 101inlorder to provide/"some drag upon the strip as it is being drawn from the hub 8 on shaft 10. The type of unvWi-ndi'n'g-appa'rat'usi's entirely conventional and neednot be -fde`scribed inldetail'i l Atthe'` lefthandend-koi thefframing vflyas viewed in Figureflithere'i-is mounted-a 'disc -18 1and hub 20 onwhich fthe coillZlT-oftleffstr-ipt ofafmateri'al is Wound after-'itis ysliivedz#r The hubl 20 isimountediorra shaft 22Which-'is supported'byftmeansitof11a-bearing structure 26 mounted on the framing!!v y Aimeto'r zoals-mounted inthe-,framing 4 and? is 'con'- nectedbyemeansl 'ot faffchainbelt 30 to drive a speed-frei du'ce` 372.1y Th/foutputl'fr'om-the-lspeed'reducer is transl niittdfthroughl `a1sprocket? Wheel `34 ltoa chain` be1tf3'6 whichasses? overfa-fspro'cket .WheelJ 38 to which there'is :ajaeentrto-'thezrolienzztolfand driven vby' a gearconnection threvvitha Thefsr'olle'r1401andrthe rollers 42serve todraw the sttip'bf material to' be-ski'ved through the skiving apparatus as will be hereinafterdescribed; n l

The ichlinfbeltlli also 'passes over a sprocket 44 con- 'n'eeteddlifdi'iv-ing relation Withaa clutch 46 through which well as-ag'uifcl'effor*y the. stripv f5() Vas`= itis fed into the iskiivin'g apparatus indicated*Ygener-allyy zit-L3V` in'fFigurefl.' The strip indicatedat1543passing o'utf'bf7 thefskiving :apparatus substantandt-raisedrcentral portions 881 andrzoutwardly yextending portions and 92 of reducedflwidth; The portion? '92 terminates in a portion 94 which is formed at an angle to the portion 92 and is adapted to enter the angle formed portion 86 of the slot 84. A pair of

screws

96 and 98 are threaded into the

end portions

90 and 92 of the block 80. The upper ends of the screws are adapted to bear against the upper surfaces of the

slots

82 and 84 and thus serve to position the block vertically in the`opening78 in the plate 62.

A plate 100 extends below the block 80 transversely thereof and is aixed to the underside of the plate 62 by a pair of bolts 102. The block 80 is provided with a central bore within which there is positioned a spring 104 which seats in the base or uppermost portion of the bore and acts against the plate serving to urge the block80 upwardly and thus maintain the uppermost ends of the

screws

96 and 98 in engagement with the bases of the slots 82 and S4, respectively. The enlarged central portion 88 of the block 80 is provided with a slot 106 extending vertically downwardly from the top of the central portion 88. The uppermost surface of the enlarged portion 88 is provided with a recess adapted to engage the beveled edges of a wear plate 108. The bolt 110 extending transversely through the enlarged portion 88 of the block 80 serves to clamp the wear plate 108 in the top of the portion of the block 88 by partially closing the vertically extending slot 106.

A pin 112 extends transversely through the reduced width portion 90 of the block 80 and has end portions with flattened vertically extending sides 114 which are adapted to ride in slots 116 in the adjacent sides of the slot 82 in the plate 62. The arrangement of the pin 112 and the slots 116 serves to position the block 80 centrally within the slot 78 while permitting vertical motion of the block.

A cam 118 is positioned between the upper Surface of the reduced portion 94 of the block 80 and the upper surface of the slot 84. It will be evident that upon rotation of the cam 118 the left-hand end of the block 80, as viewed in Figure 4, will be moved downwardly against the urging of the spring 1414. The cam 118 is slidably but non-rotatably mounted by a sliding key and elongated keyway 119 on a shaft 120 which extends transversely of the frame 2 and passes outwardly through the front of the frame, as viewed in Figure 1, and mounts a sprocket wheelover which there passes a chain belt 122. The chain belt 122 passes over a similar sprocket on a shaft 124 to which is attached an operating lever 126. It will be evident that upon depression of the lever 126 the shaft 120 will be rotated, rotating the cam 118 and depressing the left-hand end of the block 80 as viewed in Figure 4.

As previously noted, the mounting plate62 is slidably mounted on the

rods

56 and 58. The position of the lplate on these rods is adjusted by a threaded shaft 128 which is threaded into a downwardly turned flange 130 ofthe plate 62. The shaft extends through the frame of ythe ymachine in which it is mounted for rotation but xed against longitudinal motion. Externally of the machine the shaft is provided with a hand wheel, not shown, by which it may be rotated.

As will be described in greater detail hereinafter, the frame 62 and the skiving apparatus indicated generally at 57 in Figure 2 mounted thereon are preferably retained iu a stationary position and a second skiving apparatus indicated generally at 59 in Figure 2 and which will now be described is adjusted in order to accommodate for the strips of material of Various widths to be skived.

The skiving apparatus indicated generally at 59 is mounted on a plate 132 slidably positioned on the rods 58 and 60. A motor 134 is mounted on the plate 132 and drives a drum 136 on the peripheral surface of which there is affixed a strip of abrasive material 133. A housing 140 encloses a substantial portion of the drum 136 and connected to the housing 140 is a flexible conduit 142 through which particles of material removed from the strip being skivedv are removed.

The plate 132 is provided with a cutout 144 positioned below the lowermost surface of the drum 136. A block 146 is positioned within the slot 144. The slot 144 is provided with an extended portion 148 within which an extension of the block 146 is positioned. The slot 144 and the block 146 in the skiving assembly indicated generally at 59 are substantially identical to the block and -cutout arrangement heretofore described in connection with the skiving arrangement indicated generally at 58 with the exception of the fact that the blocks and slots are of right and left-hand formation respectively. A vertical section through the slots 144 and 148 and the block 146 would have the appearance of the parts shown in Figure 4.

The rod 124 extends through the frame of the machine and has a cam 154 mounted thereon within the portion 148 of the slot 144. The cam is mounted on a sliding keyway indicated at and thus when the plate 132 is moved longitudinally of the rods 58 and 60 the cam 154 is movable therewith along the rod 50 while remaining rotatable by means of the rod 124.

The plate 132 is movable longitudinally of the rods 58 and 60 by means of a rod 150 which is threaded through a flange 151 on the plate 132 and is provided at its outer end with a hand Wheel 152. The rod 150 is provided with collars, not shown, to prevent it from moving longitudinally through the frame 2. It will be evident that upon rotation of the hand wheel 152 the plate 132 will move transversely of the machine and carry with it the skiving assembly indicated generally at 59.

The strip of material to be skived indicated at 11 and 50 in Figure 1 passes, as indicated at 50 in Figure 2, under the disc 136 and the abrasive surface 138 mounted thereon. A pair of spring pressure plates 156 is affixed to the plate 132 and have their outer ends 158 extending outwardly beside the disc 136 and adapted to press the strip being skived downwardly against the block 108 and the portion of the plate 132 positioned thereunder. It will be noted from Figure 2 that the end portions 158 of these ngers extend substantially beyond the strip 50. This is, of course, to provide for the holding down of strips of greater width than the strip 50 shown in the drawing. The strip leaving the skiving arrangement indicated at 59 is shown at 52 as having one edge beveled or feathered. The strip leaving the skiving arrangement indicated generally at 57 is shown at 54 as having both edges skived. A pair of pressure ngers 160 are mounted on the plate 62 and serve to hold the strip being skived downwardly in the region of the skiving arrangement 57.

It will be noted that each of the

discs

70 and 136 is positioned with its axis of rotation forming an acute angle with the direction 4of travel of the strip being skived. The

plates

62 and 132 are so positioned with respect to the width and position of a strip being skived that 'the lowermost portion of the abrasive surface on each -of the discs is positioned so as to extend over an edge of the strip. It will be evident that by adjustment of the

screws

96 and 98 of the block 80 and by adjustment of similar vscrews in the block 146 the wear plate or platen on each of the'blocks which are identical to that indicated at 108 in Figure 4 and 5 can be adjusted to press a selected portion of the edge of the strip upwardly against its associated abrasive surfaced disc. In the particular arrangement shown in Figure 2 each of the platens is adjusted to press the strip into engagement with the abrasive surface of its associated disc for one-half of the longitudinal width of the disc. It will be evident that by variously adjusting the positions of the

plates

62 and 132 and by variously positioning the angles of the wear plates on the blocks 80 and 146 beveled or feathered edges may be provided on the strip extending inwardly from the edges of the strip for various extents to `the limit as determined by the widths of the abrasive surfaces onthe

discs

70 and 136. The motors 68 and 134 are connected .soas to rotate the discs in directions such that the portions of the surfaces of the discs engaging the strip are moving outwardly of the strip.

The motors 68 and 134 are connected to power through conventional motor controllers contained within enclosures 160 conveniently mounted on the side of the frame 2.

From the foregoing it will be evident that there is provided a skiving apparatus having a high degree of flexibility in that bevels of various widths may be provided on moving strips and, additionally, there is provided a skiving apparatus in which the abrasive surface and the platen which serves to press the Work against the abrasive surface may be not only adjusted with facility but may be replaced with facility and which replacement is accompanied by a relatively small expenditure of cost for labor and material.

What is claimed is:

1. Strip skiving apparatus comprising a pair of skiving assemblies, means for guiding a strip to be skived, each of said skiving assemblies including means providing a rotatable surface capable of removing material from a moving strip. and means for adjusting the relative positions of said skiving assemblies and said guiding means to position one of said rotatable surfaces for engagement with one edge of a strip passing over said guiding means and to position the other of said movable surfaces for engagement with the other edge of said strip, said skiving assemblies being mounted to position said rotatable surfaces with their axes of rotation extending at acute angles to the line of travel of the strip an'd the direction of travel of each of the portions of said rotatable surfaces in engagement with the strip being toward their respective edges of the strip.

2. Strip skiving apparatus comprising a pair of skiving assemblies, means for guiding a strip to be skived, each of said skiving assemblies including means providing a rotatable surface capable of removing material from a moving strip, and means for adjusting the relative positions of said skiving assemblies and said guiding means to position one of said rotatable surfaces for engagement with one edge of a strip passing over said guiding means and to position the other of said movable surfaces for engagement with the other edge of said strip, said guiding means including separate means for positioning each of the edges of the strip in engagement with its adjacent rotatable surface, said positioning means each including means pivoted inwardly of the edge of a strip in said guiding means and vertically movable outwardly of the edge of a strip in said guiding means for adjusting the angular relation between said positioning means and the portion of said rotatable surface engaged by the strip, said skiving assemblies being mounted to position said rotatable surfaces with their axes of rotation extending at acute angles to the line of travel of the strip and the direction of travel of each of the portions of said rotatable surfaces in engagement with the strip being toward their respective edges of the strip.

3. Strip skiving apparatus comprising means for positioning a longitudinally moving strip to be skived, means providing a rotatable drum capable of removing material from a moving strip to be skived and positioned to have a portion of its peripheral surface engaged by an edge portion of a strip positioned by said positioning means with its axis of rotation extending at an acute angle to the line of travel of the strip, movable means for holding a positioning moving strip in engagement with a 1ongitudinally axially extending substantially linear portion of the peripheral surface of the rotatable drum, means for adjusting the angular posiiton of said holding means in a plane extending substantially parallel to the axis of rotation of said rotatable surface for adjusting the angular relation between said holding means and the portion of said rotatable drum engaged by the strip, and separate means for displacing said holding means away from said 4. Strip skiving apparatus comprising supporting means, a pair of skiving assemblies, means mounting said skiving assemblies for independent parallel motion on said supporting means, and means for guiding a moving strip to be skived for movement across said supporting means transversely of the paths of motion of said skiving assemblies, each of said skiving assemblies including means providing a rotatable surface capable of removing material from a moving strip, means for adjusting the relative positions of said skiving assemblies and said supporting means with respect to said strip guiding means to position one of said rotatable surfaces for engagement with one edge of a strip passing over said guiding means and to position the other of said movable surfaces for engagement with the other edge of said strip, and adjustable holding means for positioning a selected portion of a moving strip in said guiding means in engagement with the rotatable surface skiving means.

5. Strip skiving apparatus comprising supporting means, a pair of skiving assemblies, means mounting said skiving assemblies for independent parallel motion on said supporting means, and means for guiding a moving strip to be skived for movement across said supporting means transversely of the paths of motion of said skiving assemblies, each of said skiving assemblies including means providing a rotatable surface capable of removing material from a moving strip, means for adjusting the relative positions of said skiving assemblies and said supporting means with respect to said strip guiding means to position one of said rotatable surfaces for engagement with one edge of a strip passing over said guiding means and to position the other of said movable surfaces for engagement with the other edge of said strip, adjustable holding means for positioning a selected portion of a moving strip in said guiding means in engagement with the rotatable surface skiving means, and separate means for displacing said holding means away from its associated rotatable surface.

6. Strip skiving apparatus comprising means for positioning a longitudinally moving strip to be skived, means providing a rotatable drum capable of removing material from a moving strip to be skived and positioned to have a portion of its peripheral surface engaged by an edge portion of a strip positioned by said positioning means with its axis of rotation extending at an acute angle to the line of travel of the strip, movable means for holding a positioned moving strip in engagement with a portion of the peripheral surface of the rotatable drum, means for adjusting the angular position of said holding means in a plane extending substantially parallel to the axis of rotation of said rotatable drum for adjusting the angular relation between said holding means and the portion of said rotatable drum engaged by the strip.

7. Apparatus in accordance with claim 6 in which said movable means holds a positioned moving strip in engagement with a longitudinally axially extending substantially linear portion of the peripheral surface of the rotating drum.

8. Apparatus in accordance with claim 6 including separate means for displacing said holding means away from said drum.

References Cited in the le of this patent UNITED STATES PATENTS 231,146 Briggs Aug. 17, 1880 1,060,759 Heldmann May 6, 1913 2,120,835 Gordon June 14, 1938 2,217,306 Burrill Oct. 8, 1940 2,277,373 Somes Mar. 24, 1942 2,392,375 Gardella Jan. 8, 1946 2,504,923 Emmons et al. Apr. 18, 1950 2,553,432 Vendien May 15, 1951 2,671,991 Thorsell Mar. 16, 1954