US4537104A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutting head for filter assembler
Assignee: Mpac Group PLC
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Filing: 1982-11-09
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Granted: 1985-08-27
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Expires: 2002-11-09
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
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:00
CPC Classifications
A; A24; A24C; A24C5/00; A24C5/47; A24C5/471; A24C5/473; B; B26; B26D; B26D7/00; B26D7/26; B26D7/2628; B26D2007/2685; Y; Y10; Y10T; Y10T83/00; Y10T83/465; Y10T83/4766; Y10T83/4795; Y10T83/483; Y10T83/4838; Y10T83/4844; Y10T83/929; Y10T83/9372; Y10T83/9403; Y10T83/9457; Y10T83/9464; Y10T83/9469; Y10T83/9471
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
105 words
A cutting head for filter attachment machine comprising a drum carrying a plurality of radially-directed knives each of which is urged radially outwards by two springs at or near the opposite ends of the respective knife so that the knife is freely outwardly movable against a single adjustable retaining device which limits said outward movement and by which the normal distance of the cutting edge of the knife from the axis of the drum can be adjusted, said retaining device for each knife being positioned centrally between the two springs so as to permit pivotal movement of the knife with respect to the cutting head.
Claim 2
Dependent Claim
105 words
A cutting head for filter attachment machine comprising a drum carrying a plurality of radially-directed knives each of which is urged radially outwards by two springs at or near the opposite ends of the respective knife so that the knife is freely outwardly movable against a single adjustable retaining device which limits said outward movement and by which the normal distance of the cutting edge of the knife from the axis of the drum can be adjusted, said retaining device for each knife being positioned centrally between the two springs so as to permit pivotal movement of the knife with respect to the cutting head.
Claim 3
Dependent Claim
50 words
A cutting head according to claim 1 in which the retaining device comprises a spindle lying substantially along a chord of the drum and having an eccentric portion which passes through an aperture in the knife so that rotation of the spindle alters the normal radial position of the knife.
Claim 4
Dependent Claim
17 words
A cutting head according to claim 2 including a locking device for securing the spindle against rotation.
Claim 5
Dependent Claim
24 words
A cutting head according to claim 1, 2 or 3 in which the retaining device for each knife is located between the two springs.
Claim 6
Dependent Claim
17 words
A cutting head according to claim 1, in which each spring comprises a body of elastomeric material.
Claim 7
Dependent Claim
25 words
A cutting head according to claim 5 in which the springs are formed by two axially spaced sleeves of elastomeric material engaging all the knives.
Claim 8
Dependent Claim
17 words
A cutting head according to claim 1 in which each spring comprises at least one spring washer.
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) | 1988-08-26 | 1989-02-25 | 1989-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-08-26 | 1993-02-25 | 1993-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-08-26 | 1997-02-25 | 1997-08-27 | $7700.00 | Window Closed / Lapsed |