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Self-centering feed rolls for a dowel machine or the like

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US2780253A
US2780253A US16582850A US2780253A US 2780253 A US2780253 A US 2780253A US 16582850 A US16582850 A US 16582850A US 2780253 A US2780253 A US 2780253A
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Prior art keywords
stock
rolls
flanges
feed
convex
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Curt G Joa
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Joa Curt G
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Joa Curt G
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27CPLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
    • B27C5/00Machines designed for producing special profiles or shaped work, e.g. by rotary cutters; Equipment therefor
    • B27C5/02Machines with table
    • B27C5/06Arrangements for clamping or feeding work
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27BSAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B25/00Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees
    • B27B25/02Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees with feed and pressure rollers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00Cutting
    • Y10T83/647With means to convey work relative to tool station
    • Y10T83/6584Cut made parallel to direction of and during work movement
    • Y10T83/6635By feed roller
    • Y10T83/6636Pinch rollers

Description

Feb. 5, 1957 c. G. JOA 2,780,253

SELF-CENTERING FEED ROLLS FOR A DOWEL MACHINE OR THE LIKE Filed June 2, 1950 Snventor 60,27 6-. Jan

the respective bulging surfaces 34 and 35 and the rough stock 13 will prevail, but it will be noted (see Fig. 3) that despite the fact that raw stock 12, between my rolls is not an accurately dimensioned square, it is positively centered and the circle 24 indicating the diameter of the dowel 8 is entirely included within the physical dimensions of the rough stock 12.

It will be further noted with respect to feed rolls in Figs. 2, 3 and 6 that the bulging contours of my feed rolls are radially grooved at 36, so that my rolls may engage the stock with a more positive feeding action. Rough stock 12 of such physical characteristics as wood will be slightly compressed by the rolls in a feeding operation sufficiently so that the rough stock will be engaged in grooves 36 for more positive feeding action. The resilient pressure of the rolls against the stock may be adjusted in the machine for this purpose and, obviously, any marking of the rough stock by the rolls is of no consquence, since this stock adjacent the ridges 13 and 16 is completely removed in the dowel making operation.

My new feed rolls are therefore effective to center the rough stock according to the ridge lines 13 and 16. There is no permissible riding of one of these ridges along such a surface as the surface 17 in old style roll 21 and the vertical center line of the rough stock, normal to the axes of the rolls, is brought most closely to the center of the cross section of the rough stock 12.

As is clearly shown in Figs. 2 and 3 the bulging or convex gripping surfaces 34 and 35 are outwardly offset from the frusto-conical surfaces otherwise provided by the outer flange surfaces 32 and 33 respectively. Accordingly, the workpiece 12, as shown in Fig. 3, is gripped only adjacent its diagonally opposed corners to align the center line of the workpiece with the center line of the cutting head of the machine. In this position the work piece is free for self-adjustment relatively without interference by the outer conical flanges 32 and 33 of the rolls.

I claim:

1. A grooved feed roll for stock having a corner ridge to be engaged by the roll, said roll having divergent flanges, the flanges being relatively less sharply divergent at the bottom of the groove and relatively more sharply divergent adjacent the outside of the roll said flanges having inwardly projecting intermediate portions to re- 4 ceive and engage the sides of the corner ridge at points intermediate said less sharply and said more sharply divergent portions of the roll flanges, leaving the apex of the ridge projecting between the less sharply divergent flange portions and out of contact therewith.

2. A grooved feed roll having divergent flanges of frusto-conical form near their outer portions and having inner portions of inwardly convex form, at least part of said convex portions being offset from the frusto-conical portions of the flanges whereby to constitute gripping bulges having line contact with work engaged by the roll.

3. The device of claim 2 wherein the inwardly convex portions of said rolls are provided with laterally extending slits.

4. A pair of cooperating feed rolls for feeding and centering polygonal stock having comer ridges, each of said rolls being provided with two opposed annular inwardly bulging and curvilinearly convex work gripping flanges for substantially line contact with opposite faces of the corner ridges of said stock, the stock being engaged at four points by said flanges and self adjusting between the bulging curvilinearly convex surfaces thereof.

5. A pair of opposed feed rolls for guiding and automatically centering angularly ridged stock and feeding such stock to a dowel machine, each of said rolls having divergent flanges with V-shaped grooves therebetween to receive such stock, the respective flanges each having annular inwardly bulging and substantially continuously curvilinearly convex work-gripping surface for at least a portion of its radial extent whereby the convex portions of the respective flanges concurrently engage the sides of ridged stock in substantial line contact with such sides, the ridges being accommodated in the grooves of said rolls, and the stock being self adjusting between the four flanges of the opposed rolls.

6. The feed rolls of claim 5 in which at least one such roll has its respective flanges provided with outwardly extending slits in its convex work-gripping surfaces.

References Cited in the file of this patent UNITED STATES PATENTS 685,812 Bartholomew Nov. 5, 1901 843,519 Crane Feb. 5, 1907 1,038,514 Anderson Sept. 17, 1912 1,606,313 Martenet Nov. 9, 1 926

US2780253A 1950-06-02 1950-06-02 Self-centering feed rolls for a dowel machine or the like Expired - Lifetime US2780253A (en)

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US2780253A US2780253A (en) 1950-06-02 1950-06-02 Self-centering feed rolls for a dowel machine or the like

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US2780253A US2780253A (en) 1950-06-02 1950-06-02 Self-centering feed rolls for a dowel machine or the like

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Cited By (105)

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US2865413A (en) * 1957-04-22 1958-12-23 Gadget Of The Month Club Inc Dowel grooving device
US3642041A (en) * 1967-05-12 1972-02-15 Canadian Internationl Paper Co Mobile tree-processing machine
US4058151A (en) * 1975-10-03 1977-11-15 Minami Kogyo Kabushiki Kaisha Automatic lumber feeding device in combination with a wood working machine
FR2457751A1 (en) * 1979-05-26 1980-12-26 Otto Kreibaum Apparatus for processing pieces of log lumber
US4630660A (en) * 1983-12-15 1986-12-23 Mcguire William J Dowell making
US4643237A (en) * 1984-03-14 1987-02-17 Jean Rosa Method for fabricating molding or slotting boards such as shutter slats, molding for carpentry or for construction and apparatus for practicing this process
US4709609A (en) * 1982-12-30 1987-12-01 Kauko Rautio Saw machine
US4936359A (en) * 1988-07-07 1990-06-26 Ccx Fantastic, Inc. Method and apparatus for breaking corners of wood members
US5069046A (en) * 1990-09-11 1991-12-03 Ford Motor Company Roller cylinder assembly for press forming glass sheets and method of using
US5127452A (en) * 1991-07-22 1992-07-07 Structural Block Systems, Inc. Dowel making machine
US5570732A (en) * 1994-07-07 1996-11-05 Andreasson; Olof Log feeding device
US20020178673A1 (en) * 1993-05-10 2002-12-05 Tony Pervan System for joining building panels
US6510665B2 (en) 2000-01-24 2003-01-28 Valinge Aluminum Ab Locking system for mechanical joining of floorboards and method for production thereof
US6516579B1 (en) 1993-05-10 2003-02-11 Tony Pervan System for joining building boards
US6532709B2 (en) 1998-06-03 2003-03-18 Valinge Aluminium Ab Locking system and flooring board
US20030101674A1 (en) * 2001-09-20 2003-06-05 Darko Pervan Flooring and method for laying and manufacturing the same
US6588166B2 (en) 1995-03-07 2003-07-08 Pergo (Europe) Ab Flooring panel or wall panel and use thereof
US6606834B2 (en) 1995-03-07 2003-08-19 Pergo (Europe) Ab Flooring panel or wall panel and use thereof
US20030196405A1 (en) * 1994-04-29 2003-10-23 Tony Pervan System for joining building panels
US20030233809A1 (en) * 2002-04-15 2003-12-25 Darko Pervan Floorboards for floating floors
US20040016196A1 (en) * 2002-04-15 2004-01-29 Darko Pervan Mechanical locking system for floating floor
US20040035078A1 (en) * 2002-03-20 2004-02-26 Darko Pervan Floorboards with decorative grooves
US20040035077A1 (en) * 1995-03-07 2004-02-26 Goran Martensson Flooring panel or wall panel and use thereof
US6715253B2 (en) 2000-04-10 2004-04-06 Valinge Aluminium Ab Locking system for floorboards
US20040139678A1 (en) * 2002-04-22 2004-07-22 Valinge Aluminium Ab Floorboards, flooring systems and methods for manufacturing and installation thereof
US6769218B2 (en) 2001-01-12 2004-08-03 Valinge Aluminium Ab Floorboard and locking system therefor
US20040177584A1 (en) * 2003-03-06 2004-09-16 Valinge Aluminium Ab Flooring and method for installation and manufacturing thereof
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US20050097860A1 (en) * 1999-07-05 2005-05-12 Goran Martensson Floor element with guiding means
US20050102937A1 (en) * 1998-06-03 2005-05-19 Valinge Aluminium Ab Locking System And Flooring Board
US20050138881A1 (en) * 2003-03-06 2005-06-30 Darko Pervan Flooring systems and methods for installation
US20050160694A1 (en) * 2002-04-03 2005-07-28 Valinge Aluminium Mechanical locking system for floorboards
US20050166514A1 (en) * 2004-01-13 2005-08-04 Valinge Aluminium Ab Floor covering and locking systems
US20050166516A1 (en) * 2004-01-13 2005-08-04 Valinge Aluminium Ab Floor covering and locking systems
US20050208255A1 (en) * 2002-04-08 2005-09-22 Valinge Aluminium Ab Floorboards for floorings
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US20070186405A1 (en) * 2006-02-16 2007-08-16 James Rogers Cutting assemblies and methods
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US843519A (en) * 1906-05-31 1907-02-05 Daniel Crane Traction-roll mechanism.
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Cited By (285)

* Cited by examiner, † Cited by third party
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US2865413A (en) * 1957-04-22 1958-12-23 Gadget Of The Month Club Inc Dowel grooving device
US3642041A (en) * 1967-05-12 1972-02-15 Canadian Internationl Paper Co Mobile tree-processing machine
US4058151A (en) * 1975-10-03 1977-11-15 Minami Kogyo Kabushiki Kaisha Automatic lumber feeding device in combination with a wood working machine
FR2457751A1 (en) * 1979-05-26 1980-12-26 Otto Kreibaum Apparatus for processing pieces of log lumber
US4306596A (en) * 1979-05-26 1981-12-22 Otto Kreibaum Device for processing round lumber sections
US4709609A (en) * 1982-12-30 1987-12-01 Kauko Rautio Saw machine
US4630660A (en) * 1983-12-15 1986-12-23 Mcguire William J Dowell making
US4643237A (en) * 1984-03-14 1987-02-17 Jean Rosa Method for fabricating molding or slotting boards such as shutter slats, molding for carpentry or for construction and apparatus for practicing this process
US4936359A (en) * 1988-07-07 1990-06-26 Ccx Fantastic, Inc. Method and apparatus for breaking corners of wood members
US5069046A (en) * 1990-09-11 1991-12-03 Ford Motor Company Roller cylinder assembly for press forming glass sheets and method of using
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