US3637146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hammermill construction
Assignee: Kimberly Clark Corp
•
Filing: 1969-10-27
•
Granted: 1972-01-25
•
Expires: 1989-10-27
Abstract
Abstract A hammermill for wood pulp fiberizing has rotary blades, the front faces of which are bevelled so that pulp impacted by the rotors tends to slide from the rotors, avoiding repeated impacts of pulp on pulp, thereby minimizing pulp clots.
Inventors
- 👤 Charles T Banks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:44
CPC Classifications
D; D21; D21B; D21B1/00; D21B1/04; D21B1/06; D21B1/066; B; B02; B02C; B02C13/00; B02C13/02; B02C13/04; B02C13/26; B02C13/28
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
101 words
In combination, in a hammermill having an inlet, an outlet and a blade carrying rotor interposed between the inlet and outlet, blades on said rotor serving as hammers and which sweep across said inlet in their rotation to fiberize pulp introduced at the inlet and direct it to the outlet, each of said blades having a front face for engaging said pulp and which face is rectilinearly bevelled at an angle of between 15* and about 45* from the periphery of the blade and narrows in width toward the blade periphery to urge pulp in a sliding action toward the periphery.
Claim 2
Dependent Claim
101 words
In combination, in a hammermill having an inlet, an outlet and a blade carrying rotor interposed between the inlet and outlet, blades on said rotor serving as hammers and which sweep across said inlet in their rotation to fiberize pulp introduced at the inlet and direct it to the outlet, each of said blades having a front face for engaging said pulp and which face is rectilinearly bevelled at an angle of between 15* and about 45* from the periphery of the blade and narrows in width toward the blade periphery to urge pulp in a sliding action toward the periphery.
Claim 3
Dependent Claim
18 words
The combination according to claim 1 in which the bevel angle is between about 25* and 35* .
Claim 4
Dependent Claim
15 words
The combination according to claim 1 in which the bevel angle is about 30* .
Claim 5
Dependent Claim
30 words
The combination according to claim 1 in which the front face of the blade in the bevel area is at least as long as the peripheral face of the blade.
Claim 6
Dependent Claim
25 words
The combination according to claim 4 in which the front face of the blade in the bevel area is twice that of the peripheral face.
References Cited (Backward Citations)
GB645098A
Cited
US2803634A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |