Skip to page content
USDA Forest Service

Research & Development Treesearch

Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help - We Participate  Government Made Easy

Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (2.03 MB bytes)

Title: Shaping-lathe roundup machine is key to profitable manufacture of composite sheathing panels in Massachusetts or Maine

Author: Springate, Norman; Koch, Peter; Plough, Irving;

Date: 1978

Source: Forest Products Journal, Vol. 28(10): 42-47

Publication Series: Miscellaneous Publication

Description: A process is described in which a shaping-lathe headrig produces flakes of optimum geometry while rounding 8-foot peeler bolts to their maximum cylindrical diameter. The cylinder are then passed, at a rate of 5 to 7 per minute, to a veneer lathe for production of continuous veneer, which is Subsequently clipped into 4- by 8-foot sheet.. Veneer cores are flaked in a separate operation; these flakes, mixed with the flakes resulting from roundup, veneer residue, and panel trim, are pressed into 4- by 8-foot core sheets 9/32 to 13/32 inch thick. In a separate pressing operation, the flake cores are faced with 1/8-inch veneer to yield structural exterior composite sheath-ing of superior quality. By this process, a ton of bark-free peeler bolts should yield more than .9 ton of sheathing (OD basis); less than .1 ton (mostly sanderdust) ends 88 fuel. All other residue, except bark, is incorporated in the sheathing. The proposed plant will consume 5,000 to 6,000 peeler bolt. per 3- shift day. Baaed on an average log diameter (small end, inside bark) of 10 inches, annual production during 240 3-shift operating days should be 100,000,000 square feet of 17/32.inch panel (1/2 inch nominal). Plant cost plus operating capital is estimated at $23,000,000. when sited in western Massachusetts or in central Maine, the operation should return a before-tax profit of about 36 percent (and an after tax profit of 18-1/2%) of the entire investment; cash flow should be about 28-1/2percent, or $6,520,000 annually, after taxes.

Publication Notes:

  • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
  • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
  • You may send email to to request a hard copy of this publication. (Please specify exactly which publication you are requesting and your mailing address.)



Springate, Norman; Koch, Peter; Plough, Irving 1978. Shaping-lathe roundup machine is key to profitable manufacture of composite sheathing panels in Massachusetts or Maine. Forest Products Journal, Vol. 28(10): 42-47


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.