US3842874A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for preshaping raw logs
Assignee: Taihei Machinery Works Ltd
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Filing: 1972-07-12
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Granted: 1974-10-22
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Expires: 1992-07-12
Abstract
Abstract In each of the intersections between the outer surface of a raw log and a plurality of longitudinal sectional planes passing through the center axis of the log, that point which is nearest the center axis is detected, and the log is so cut that, in each of the sectional planes, all points in the resulting outer line are at the same distance from the center axis as the above mentioned nearest point, whereby the raw log is preshaped into a columnar shape of the same coaxial cross section over the entire length thereof. By rotary cutting this preshaped log, rectangular veneer pieces without waste edge parts can be obtained before the log becomes a true circular cylinder.
Inventors
- 👤 N Noriyuki
- 👤 N Haruo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:24
CPC Classifications
B; B27; B27L; B27L5/00; B27L5/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
122 words
A method of preliminarily shaping a raw log into columnar shape for subsequent economical rotary cutting thereof to produce veneer pieces having a definite rectangular shape, which comprises detecting that point in each of the intersections between the outer surface of said log and plurality of longitudinal sections passing through the center axis of the log which is nearest said center axis and cutting away the outer surface part of the log along element lines each alined in parallel to the center axis and passing through a respective one of said detected points while carrying out profiling based on said detected points thereby to preshape the log into a columnar shape of substantially the same planar shape in any cross section thereof.
Claim 2
Independent Claim
122 words
A method of preliminarily shaping a raw log into columnar shape for subsequent economical rotary cutting thereof to produce veneer pieces having a definite rectangular shape, which comprises detecting that point in each of the intersections between the outer surface of said log and plurality of longitudinal sections passing through the center axis of the log which is nearest said center axis and cutting away the outer surface part of the log along element lines each alined in parallel to the center axis and passing through a respective one of said detected points while carrying out profiling based on said detected points thereby to preshape the log into a columnar shape of substantially the same planar shape in any cross section thereof.
Claim 3
Independent Claim
147 words
A method of preliminarily shaping a raw log in a plurality of longitudinal contiguous parts for subsequent economical rotary cutting thereof to produce veneer pieces having a definite rectangular shape which comprises: geometrically dividing the log into a plurality of longitudinally contigUous parts; detecting, in each of said parts, that point in each of the intersections between the outer surface of the log and a plurality of longitudinal sections passing through the center axis of said part which is nearest the center axis; and, in each part, cutting away the outer surface part of the log along element lines each alined in parallel to the center axis and passing through a respective one of the points thus detected, while carrying out profiling based on said detected points thereby to preshape each part into a columnar shape of substantially the same planar shape in any cross section thereof.
Claim 4
Independent Claim
147 words
A method of preliminarily shaping a raw log in a plurality of longitudinal contiguous parts for subsequent economical rotary cutting thereof to produce veneer pieces having a definite rectangular shape which comprises: geometrically dividing the log into a plurality of longitudinally contigUous parts; detecting, in each of said parts, that point in each of the intersections between the outer surface of the log and a plurality of longitudinal sections passing through the center axis of said part which is nearest the center axis; and, in each part, cutting away the outer surface part of the log along element lines each alined in parallel to the center axis and passing through a respective one of the points thus detected, while carrying out profiling based on said detected points thereby to preshape each part into a columnar shape of substantially the same planar shape in any cross section thereof.
Claim 5
Independent Claim
168 words
A method of preshaping a raw log into columnar shape for economical rotary cutting thereof, which comprises detecting that point in each of the intersections between the outer surface of said log and a plurality of longitudinal sections passing through the center axis of the log which is nearest said center axis and cutting away the outer surface part of the log along element lines each alined in parallel to the center axis and passing through a respective one of said detected points while carrying out profiling based on said detected points thereby to preshape the log into a columnar shape of substantially the same planar shape in any cross section thereof, in which said profiling working comprises the steps of cutting a guide groove around the outer surface of the log by profiling said outer surface in accordance with the detected points included in said respective intersections and then profiling the outer surface part of the log in accordance with the form of said cut guide groove.
Claim 6
Independent Claim
168 words
A method of preshaping a raw log into columnar shape for economical rotary cutting thereof, which comprises detecting that point in each of the intersections between the outer surface of said log and a plurality of longitudinal sections passing through the center axis of the log which is nearest said center axis and cutting away the outer surface part of the log along element lines each alined in parallel to the center axis and passing through a respective one of said detected points while carrying out profiling based on said detected points thereby to preshape the log into a columnar shape of substantially the same planar shape in any cross section thereof, in which said profiling working comprises the steps of cutting a guide groove around the outer surface of the log by profiling said outer surface in accordance with the detected points included in said respective intersections and then profiling the outer surface part of the log in accordance with the form of said cut guide groove.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-21 | 1978-04-22 | 1978-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-21 | 1982-04-22 | 1982-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-21 | 1986-04-22 | 1986-10-22 | $7700.00 | Window Closed / Lapsed |