US3832114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutter shaft device in a pelletizing apparatus for synthetic resins
Assignee: Japan Steel Works Ltd
•
Filing: 1973-02-05
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Granted: 1974-08-27
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Expires: 1993-02-05
Abstract
Abstract In a pelletizing apparatus for synthetic resins, the coarse and fine adjustments of the gap between a cutter knife and a die are effected through coarse and fine shiftings of the cutter shaft caused by the operation of separate means adapted for the coarse and fine shiftings, respectively.
Inventors
- 👤 M Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:22
CPC Classifications
B; B29; B29B; B29B9/00; B29B9/02; B29B9/06; B29B9/065; Y; Y10; Y10T; Y10T83/00; Y10T83/485; Y10T83/494; Y10T83/501
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
181 words
An adjusting device for the cutter shaft of a pelletizing apparatus for synthetic resins, rotatably mounted in a casing of the apparatus for axial displacement and carrying, at its inner end, a cutter holder carrying knives cooperable with an extrusion die of the apparatus, with a shaft driving means coupled to the shaft, said adjusting device comprising, in combination, coarse adjustment means coupled to the outer end of said shaft and operable to shift said shaft axially through a relatively large distance; fine adjustment means threaded into said casing and rotatably engaged with said shaft; interengageable abutment means limiting axial movement of said shaft in one direction relative to said fine adjustment means; said coarse adjustment means normally biasing said shaft axially inwardly to maintain said abutment means interengaged and preventing backlash of the threaded engagement of said fine adjustment means in said casing; whereby, upon rotation of said fine adjustment means, a fine axial adjustment of said shaft is effected; and operating means engaged with said fine adjustment means to rotate the same to effect fine adjustment of said shaft.
Claim 2
Dependent Claim
181 words
An adjusting device for the cutter shaft of a pelletizing apparatus for synthetic resins, rotatably mounted in a casing of the apparatus for axial displacement and carrying, at its inner end, a cutter holder carrying knives cooperable with an extrusion die of the apparatus, with a shaft driving means coupled to the shaft, said adjusting device comprising, in combination, coarse adjustment means coupled to the outer end of said shaft and operable to shift said shaft axially through a relatively large distance; fine adjustment means threaded into said casing and rotatably engaged with said shaft; interengageable abutment means limiting axial movement of said shaft in one direction relative to said fine adjustment means; said coarse adjustment means normally biasing said shaft axially inwardly to maintain said abutment means interengaged and preventing backlash of the threaded engagement of said fine adjustment means in said casing; whereby, upon rotation of said fine adjustment means, a fine axial adjustment of said shaft is effected; and operating means engaged with said fine adjustment means to rotate the same to effect fine adjustment of said shaft.
Claim 3
Dependent Claim
38 words
An adjusting device for the cutter shaft of a pelletizing apparatus for synthetic resins, as claimed in claim 1, in which said coarse adjustment means comprises a fluid pressure actuator coupled to the outer end of said shaft.
Claim 4
Dependent Claim
62 words
An adjusting device for the cutter shaft of a pelletizing apparatus for synthetic resins, as claimed in claim 1, in which said fine adjusting means comprises an adjusting member threadededly engaged in said casing; said operating means comprising a worm wheel coupled to said adjusting member for rotation thereof and axial displacement relative thereto, and a worm meshing with said worm wheel.
Claim 5
Dependent Claim
30 words
An adjusting device for the cutter shaft of a pelletizing apparatus for synthetic resins, as claimed in claim 3, in which said coarse adjustment means comprises a compressed air actuator.
Claim 6
Dependent Claim
105 words
An adjusting device for the cutter shaft of a pelletizing apparatus for synthetic resins, as claimed in claim 4, in which said shaft driving means comprises a driving wheel; means coupling said driving wheel to said shaft for conjoint rotation therewith while providing for relative axial movement of said driving wheel and said shaft; said driving wheel having an axially outwardly extending hub portion rotatably supported in said casing for relative axial displacement in said casing and rotatably supporting said shaft, and having an axially inwardly extending hub portion rotatably engaged through said adjusting member and fixed against axial displacement relatively to said adjusting member.
Claim 7
Dependent Claim
52 words
An adjusting device for the cutter shaft of a pelletizing apparatus for synthetic resins, as claimed in claim 5, in which said interengageable abutment means comprise a axially inwardly facing shoulder on said shaft engageable with an axially outwardly facing shoulder on said axially inwardly extending hub portion of said driving wheel.
Claim 8
Dependent Claim
47 words
An adjusting device for the cutter shaft of a pelletizing apparatus for synthetic resins, as claimed in claim 1, in which said shaft driving means is located within said casing; said fine adjustment means being positioned between said driving means and said inner end of said shaft.
References Cited (Backward Citations)
US2677290A
Cited
US3353213A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-26 | 1978-02-25 | 1978-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-26 | 1982-02-25 | 1982-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-26 | 1986-02-25 | 1986-08-27 | $7700.00 | Window Closed / Lapsed |