US3612413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Angle grinding pulp grinder
Assignee: Saint Gobain Abrasives Inc
•
Filing: 1969-05-07
•
Granted: 1971-10-12
•
Expires: 1989-05-07
Abstract
Abstract A grinder for making wood pulp wherein the logs are presented to the grinding face of the pulpstone with their longitudinal axes generally parallel to a plane that includes the line of tangency where the logs engage the pulpstone but with the axes of the logs at an angle to the axis of the pulpstone. The axes of the logs are turned at an angle of from about 2* to 30* to the axis of the pulpstone during grinding so that the sides of the logs are progressively disintegrated as the angularly disposed logs are pressed into the grinding wheel.
Inventors
- 👤 James H Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:19
CPC Classifications
B; B27; B27L; B27L11/00; B27L11/06
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
19 words
A method as in claim 1 wherein said angle of fiber disposition is about 8* from a parallel relationship.
Claim 2
Dependent Claim
151 words
Apparatus for grinding logs to produce fibrous pulp comprising an abrasive grinding wheel, means for rotatably mounting and driving said wheel, a pocket for receiving logs disposed in parallel relation to be fed against the surface of said wheel with their longitudinal axes ultimately being substantially tangent to the wheel surface as the logs are each individually ground away and the longitudinal axes of the logs also being disposed at an angle to the axis of the wheel, a pressure-applying means for forcibly engaging said logs against the surface of said wheel, said pocket for receiving the logs being a chamber of rectangular cross section having an open end facing the wheel, and guide means in the form of cams disposed at diagonally opposite corners of said open end for engaging the logs to produce the desired angular relationship between the axes of the logs and the axis of the wheel.
Claim 3
Dependent Claim
17 words
The apparatus of claim 3 wherein said guide means are variable to select the desired angular relationship.
Claim 4
Dependent Claim
54 words
The apparatus of claim 3 wherein said guide means are variable to select the desired angular relationship to turn the logs so that their longitudinal axes will be turned to an angle with respect to the axis of the wheel that falls within a range of from 8* to 30* from a parallel position.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |