Log mill band-saw blade for initial processing of timber and derivatives thereof

• US 5,868,058 A
• Filed: 09/15/1997
• Issued: 02/09/1999
• Est. Priority Date: 07/22/1993
• Status: Expired due to Fees

• Current Assignee: Manufacture Forezienne de Lames de Scies SA
• Original Assignee: Manufacture Forezienne de Lames de Scies SA
• Inventors: Senegas, Christian
• Primary Examiner(s): Rachuba, M.
• Assistant Examiner(s): PRYOR, SEAN AUGUSTUS
• Application Number:
  US08/931,078
• Time in Patent Office: 512 Days
• Field of Search: 83/846, 83/847, 83/851, 83/835
• US Class Current: 83/846
• CPC Class Codes: B23D 61/121 Types of set; Variable teeth, e.g. variable in height or gullet depth; Varying pitch; Details of gullet
• CPC Class Codes: Y10T 83/9319 Toothed blade or tooth therefor
• CPC Class Codes: Y10T 83/9346 Uniformly varying teeth or tooth spacing
• CPC Class Codes: Y10T 83/9348 Undulating tooth arrangement
• CPC Class Codes: Y10T 83/9358 Series of dissimilar teeth

Abstract

A log band saw blade for primary wood processing, consisting of a series of different modules (M1, M2, M3 . . . ) or identical modules, each including a number of teeth (D) having variable characteristics determined in accordance with all the relevant technical criteria. In each module, the tooth portion located in front of the lowest point has a variable shape (FV) while the tooth portion located therebehind has a constant shape (FC).

Claims

1. A log-mill band-saw blade for initial timber processing, said blade comprising at least one module, each said module including a plurality of adjacently arranged saw teeth, each said tooth having a substantially vertical rake surface, a curved relief surface oppositely disposed from said rake surface relative to a tooth tip, and a curved offset surface connecting each curved relief surface with a rake surface of a succeeding tooth, in which the intersection of the curved relief surface and the curved offset surface defines the lowest point of said tooth which extends beneath the lowest point of said rake surface and wherein each of said curved relief surfaces has a constant horizontal dimension defined by an identical contour, and at least some of said curved offset surfaces in said module have a variable horizontal dimension and a variable contour.

2. A log mill band-saw blade as recited in claim 1, in which at least one said module includes a tooth pattern having a variable pitch from tooth to tooth, said pitch increasing along one direction of said pattern and decreasing along a second opposite direction.

3. A log mill band-saw blade as recited in claim 2, wherein the pitch variation between teeth in said tooth pattern increases and decreases proportionally in said respective directions.

4. A log mill band-saw blade as recited in claim 2, wherein the pitches of said blade is adjusted to allow said blade to have a length dimension equivalent to that of a standard band-saw blade.

5. A log mill band-saw blade as recited in claim 1, having a plurality of modules, each module of said plurality consisting of a tooth pattern containing a variable number of teeth.

6. A log mill band-saw blade as recited in claim 1, having a plurality of modules, each said module consisting of a variable number of different shaped teeth.

7. A log mill band-saw blade as recited in claim 1, including a plurality of modules, each said module consisting of a variable number of teeth having varying shape and pitch.

8. A log mill band-saw blade as recited in claim 1, including a plurality of modules, in which adjacent modules contain teeth patterns which oppositely increase and decrease in size.

9. A log mill band-saw blade as recited in claim 1, including a plurality of modules, in which at least one said module includes a tooth pattern having a plurality of teeth having various shapes, and in which each of said various shaped teeth include pitches which are proportional to each tooth shape.

10. A log mill band saw-blade as recited in claim 1, including at least one module wherein each said module includes a plurality of teeth of identical shape, and in which the plurality of teeth include shape parameters which are proportional to their pitch.

11. A log mill band-saw blade as recited in claim 1, wherein at least one module includes teeth having different shapes, in which the shapes of said teeth are the result of a combination of camming elements that are the part of kinematics of sharpening machines.