Patent US4370908A successfully refreshed from Google Patents.
US4370908A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting head for filter assembler
Assignee: Mpac Group PLC
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Filing: 1980-04-07
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Granted: 1983-02-01
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Expires: 2000-04-07
Abstract
Abstract A cutting head for a filter attachment machine comprises a drum carrying a number of knives each of which is urged radially outwards by at least one spring against an adjustable retaining device by which the normal distance of the cutting edge from the axis of the drum can be adjusted.
Inventors
- 👤 Michael E. DeAlto
- 👤 Joseph D. DiGiacomo
- 👤 Clifford R. Marritt
- 👤 Edward G. Preston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:38
CPC Classifications
B; B26; B26D; B26D7/00; B26D7/26; A; A24; A24C; A24C5/00; A24C5/47; A24C5/471; A24C5/473; B26D2007/2685; Y; Y10; Y10T; Y10T83/00; Y10T83/465; Y10T83/4766; Y10T83/4795; Y10T83/483; Y10T83/4844; Y10T83/929; Y10T83/9372; Y10T83/9406; Y10T83/9457; Y10T83/9464; Y10T83/9469; Y10T83/9471
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
105 words
A cutting head for a filter attachment machine comprising a drum carrying a plurality of knives each of which is urged radially outwards by at least one spring against an adjustable retaining device which limits radially-outward movement of the corresponding knife and includes adjustment means for adjusting the outer limiting portion of the knife, said spring comprising a resilient beam which extends along a radially-inner face of the knife and is resiliently flexed, and is arranged to engage the knife so as to urge it radially outwards, and further including a central fulcrum about which each knife can pivot with respect to the cutting head.
Claim 2
Dependent Claim
105 words
A cutting head for a filter attachment machine comprising a drum carrying a plurality of knives each of which is urged radially outwards by at least one spring against an adjustable retaining device which limits radially-outward movement of the corresponding knife and includes adjustment means for adjusting the outer limiting portion of the knife, said spring comprising a resilient beam which extends along a radially-inner face of the knife and is resiliently flexed, and is arranged to engage the knife so as to urge it radially outwards, and further including a central fulcrum about which each knife can pivot with respect to the cutting head.
Claim 3
Dependent Claim
25 words
A cutting head according to claim 1 in which the central fulcrum is arranged to permit the knife to pivot with respect to the beam.
Claim 4
Dependent Claim
62 words
A cutting head for a filter attachment machine, comprising a drum carrying a number of knives each of which is located along a spring beam which is separate from the knife, is resiliently flexed and engages the knife so as to urge it radially outwards, and including a central fulcrum about which each knife can pivot with respect to the cutting head.
Claim 5
Dependent Claim
62 words
A cutting head for a filter attachment machine, comprising a drum carrying a number of knives each of which is located along a spring beam which is separate from the knife, is resiliently flexed and engages the knife so as to urge it radially outwards, and including a central fulcrum about which each knife can pivot with respect to the cutting head.
Claim 6
Dependent Claim
25 words
A cutting head according to claim 3 in which the central fulcrum is arranged to permit the knife to pivot with respect to the beam.
Claim 7
Dependent Claim
48 words
A cutting head for a filter attachment machine, comprising a drum carrying a number of knives each of which has a centrally-disposed pivotal mounting on the drum, which pivotal mounting is carried by said drum so as to be movable radially inwards against the resistance of a spring.
Claim 8
Dependent Claim
48 words
A cutting head for a filter attachment machine, comprising a drum carrying a number of knives each of which has a centrally-disposed pivotal mounting on the drum, which pivotal mounting is carried by said drum so as to be movable radially inwards against the resistance of a spring.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-31 | 1986-08-02 | 1987-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-31 | 1990-08-02 | 1991-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-31 | 1994-08-02 | 1995-02-01 | $7700.00 | Window Closed / Lapsed |