US1241925A

US1241925A - Feed-roller construction.

Info

Publication number: US1241925A
Application number: US5841415A
Authority: US
Inventors: Thomas A Coleman
Original assignee: PETER VREDENBURGH JR
Current assignee: PETER VREDENBURGH JR
Priority date: 1915-10-28
Filing date: 1915-10-28
Publication date: 1917-10-02
Anticipated expiration: 1934-10-02

Description

'N "mm" A Vf T. A. COLEMAN.

FEED ROLLER CONSTRUCTION.. APPLICATION F|LEn.ocT. 2s. |915.

1,241,925. Patented oet. 2,1917.

Athat the teeth therein have two corners or points, one in the plane of each side face of the bar.

lntermediate the movable carriers l are movable clamping collars 7 having their ments.

opposite faces undercut so as to extend over the `beveled ends of the carriers and the sloping extremities of the engaging ele- These clamping collars, like the n carriers, are freely movable both longitudi nally and circumferentially on the shaft, so that pressure may be transmitted through them from engaging elements on one carrier to `engaging elements on the others.

y The terminal clamping collars 2 are underout en one side in a fashion similar to the clamping collars 7 so as to engage the outer ends of the terminal carriers and the engag. ing elements thereon. r@ne of the clamping collars 2 is designed to form a iixed abutment, and hence maybe fixed to the shaft, but one of said collars must be movable longitudinally on the shaft, as by virtue 'of its screw thread mounting, so that it may be moved into and out of engagement with the adjacent carrier and engaging elements.

`With the carriers and clamping collars disposed on the shaftyas described, and the engaging elements disposed in the grooves or seats of the carriers, the movable terminal4 collar 2 may be moved toward the other terminal collar, forcing the juxtaposed engaging elements, carriers and clamping collars into engagement seriet/m longitudinally of the shaft, whereby the overhanging peripheral portions of the clamping collars are caused to engage over the ends of the engaging elements and force and clamp them securely into the seats, due to the sloping or inclined form of their contacting parts. lWhen in their proper relative positions, the terminal .clamping collars, operating by the pressure or compression exerted through the engaging elements and interspaced clamping collars, serve to hold the carriers and clamping collars securely on the shaft for rotation therewith, and the engaging elements rmly and securely seated in the carriers.

`With the engaging elements thus seated in the carriers, as is seen in Fig. 2, the tooth points along one side of a bar or engaging element will be vfarther from the shaft than the tooth points along the other side of a bar. This, of co rse, is due to the non-radial position of the bars in the carriers. In operation, the roller is rotated in the direction of pitch of the engaging elements, which is the direction indicated hy the arrow in Fig. A s the lumber represented by L, Fig. 2, is fed to the roller, it is engaged by the outer series of tooth points of the engaging elements, which afford a purchase on the lumber whereby the movement necessary to feed it forward to the saws may be transmitted fromv the revolving roller. lt

will be seen that in this operation, the thrust and reaction exerted against the engaging elements are exerted in the line of the engaging elements and not across them as it is in instances where they are disposed radially in the carriers. This brings the thrust through the maximum width of the material in the engaging elements and against the bottoms of the seats in which they are secured. By virtue of this arrangement, the possibility of distorting or bending vthe toothed bars is greatly decreased.

ills it will be seen how in this operation the points or corners along only one side of a bar will be brought into operative engagement with the lumber, it is obvious that'wear on an engaging element will be confined to one side of the bar. Vihen the engaging elements become so worn on one side as to lose their efiiciency, they may be reversed in their seats by loosening up the movable terminal clamping collar, moving the carriers until the engaging elements are disengaged from the clamping collars, then extracting the engaging elements from their seats and reversing them end for end. By this operation, the sides or corners of the bars which before were at the underside or nearer the periphery of the carriers, will be at the outer side or on the greater radius, and hence will be the corners or edges which will engage the lumber. Not having been subjectto wear when the opposite edges or corners were the active ones, the edges or corners now active will be sharp and givethe rollers the proper eliiciency. ln this fashion by simple reversal of engaging elements or toothed bars, the roller may be provided with a new and sharp work surface, without entailing loss of time or expense in sharpen Y ing or replacing the work engaging portions.

lt is obvious that with the engaging elements disposed in this non-radial position, their sloping ends will extend some distance circumferentially across the undercut faces of the clamping collars. ln order 'to increase the Contact surface between the ends of the engaging elements and the clamping collars, the sloping ends of the former are given a slightly rounded contour, as shown in Fig. 3, such contour being that which will follow the face of the clamping collar. Furthermore., as shown in Fig. 3, each end will be beveled in opposite directions at the proper angle so as to give increased contact surface.

rrlhe ends are Ybeveled in opposite directions from medial lineso' as' to 'provide contact".

the' carrier, and for' its reversed positionv above described. In Figs. 5, 5a,

signed for use where a very sharp worlfing' surface is required, and; it will be observed that instead of being simply serrated, the toothed edge is beveled in a third'v direction,` forming pyramidal teeth ,having a flat front face and a sharp point. Toothed bars'of this form are designed for use inl rollers wherein the' engaging elements are disposed in either radial or non-radial position.l l form of toothed bar a most eifec'tivefeeding engagement with the lumber is obtained, with the leastamount of scoring or marking on it by the bars.f The flat front faces on the teeth prevent their' breaking through the material, while the sharp points pierce' through the fiber without spl'intering" it and the' rearwardly beveled portion clears the surface of the lumberr so 4as to'leavel n'oA mark. In the form illustrated in' Figs. 5 and: 5a the rear' bevel is straight, whereas' in the form illustrated in Figs. 6 and 61 the rear bevel is curved. i r

In Fig. 7 is shown a partial cross section of a roller in which bars of the form"illustrated in Figs. 5 to 6? inclusive are disposed in non-radial position.

project forwardly so as to .have a somewhat hooklike action as they meet the lumber. This insures their taking a better grip on the lumber, and is of particular importance in operating upon heavy timbers and when the speed of the feeding roller is high.

For use with soft lumber, it may not be desirable, and is not necessary, to form the engaging elements with the serrations or teeth, and in such instances, with my improved roller construction, simply a plain bar of rectangular cross `section may be used efficiently. Due to thenon-radial setting of the bar, it is not necessary to bevel its operating side down tol an edge in order to secure proper working engagement, as the slanting position of the bar in the carrier presents its rectangular corner to the work in proper relationship to secure the effective yworking engagement necessary to feed the lumber. In this plain form of bar, when one corner is worn down, the other corner may be brought into operative position by simply reversing the bar as described above.

From the foregoing, it will be observed that my improved construction provides a feeding roller wherein the engaging elements are removably disposed in such position as to best withstand the stresses to which they are subjected, and in which they are most etlicient in securing an effective feeding operation.

v 6' and I haveshown two other 'forms of toothed bars. Theseare d'e-Y With this*- It will be observed' 'A that in such construction the working points' ItA willv be observed, furthermore, that by virtue of' this4 construction, tlie'iwork vengaging. elements may be to allV effects' renewed by simply reversingV them'- in their seats so asto-l present new' workingV portions. It;y is

thu'sobviou's that my improved' construct-iony provides a feeding', roller which isA bothevery very economical' l efficient in voperation and 1nI upkeep; y

I am aware' thatthe devices herein illustratedf and described are susceptible' foff'urther'lch'angjes ancl^ji1iodifi`cations without departingfrom the spirit and scope of the inj venti'on' indicated yin the following, claims. j

What' IAV claim' is:

l?. A feeding roller"incl`uding substantia'l'ly cylindrical carrier, said carriei1` being provided with longitudinal slots extending tliereinto tangentially relativel to'.l a circle concentric therewith, longitudinally extending bars seated in said slots andi havingprojecting portions eirten'dingoutwardly beyond' f thek carrier and lpitchedin the direction ofl rotation thereof, said projecting portionsl being'formed-'with beveled rear` faces and with'flat front work engaging faces adapted. toz 'engage ImaterialV to feed it with rotary soy movement of the carrier, and means for sef curing the, bars inthe slots.

2'. A feeding roller" including a revolubly mounted carrier, said carrier'being provided with longitudinalslots `about its periphery extending into' the carrier tan'genti'ally relative' tol a circle concentric with its axis, engaging elements in the form of bars reinovably mounted in said slots and having portions projecting froin the carrier and beveled to form hook-like members pitched in the direction of rotation of the roller and adapted to engage lumber to feed it with rotary movement of the carrier, and means cooperating with the extremities of the engaging elements to clamp them into the slots.

3. In a feeding roller, a vsubstantially cylindrical carrier mounted for rotative movement, engaging elements in the form of bars extending vlongitudinally of said carrier and removably mounted therein so that theyl eX- tend outwardly from the periphery of the carrier and are pitched in the direction of the latters rotation, whereby their engagement with material when in operation tends to force them into their seats, the projecting lumber to feed it upon rotary movement of v the carrier, and removable means coperatf substantially cylindrical carrier, a longitu-k dinally extending bar seated therein and extending from the periphery thereof tangentially relative to a circle concentric with the carrier7 said bar having work engaging edges at the opposite sides thereof and being reversible in the carrier so as to dispose either of said edges in operative position7 and means coperating with the extremities of said bar for clamping itA in the carrier.

6. In a feed roller, the combination of a substantially cylindrical carrier, a clamping collar longitudinally movable relative thereto7 and an engaging element in the form of a longitudinally extending bar seated in the carrier and having its extremity extending beyond the end of the carrier and curved for engagement with the clamping collar, by which engagement the engaging element is clamped in its seat.

7. In a feed roller7 the combination of a cylindrical. carrier, a clamping collar having a rentrant clamping face, and an engaging element seated in the carrier tangentially relative to a circle concentric therewith and having its extremity extending beyond the end of the carrier and beveled transversely Copies of this patent may be obtained for to afford surface Contact with the clamping face of the collar.

8. In a feeding roller, the combination of a substantially cylindrical carrier, engaging elements 'seated therein and extending from the'periphery thereof pitched in the direction of rotation of the roller, said engaging elements having flat forward faces and their rearward sides beveled in the direction in which said engaging elements are pitched, the arrangement providing peripherally disposed hook-like members for engaging lumber to carry it forward upon rotation of the roller.

9. In a feeding roller, a work engaging element comprising a iat har having its operating edge formed by a longitudinal series of serrations and a lateral bevel extending from the apices of the serrations at the yrearward side of the bar to provide sharp work engaging points along the margin of the bar and flat work feeding faces at the forward side thereof.

In testimony whereof I hereunto affix my signature in the presence of two witnesses, this 21st day of October, 1915.

THOMAS A. COLEMAN.

Witnesses: y

IVI. I. SMITH, M. A. HANDEL.

ve cents each, by addressing the Gommissioner of Patents, Washington, D. C.