Patent US3668964A successfully refreshed from Google Patents.
US3668964A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chopper body
Assignee: Fibreglass Ltd
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Filing: 1968-08-22
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Granted: 1972-06-13
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Expires: 1988-08-22
Abstract
Abstract Apparatus for chopping sized glass fiber filaments comprising two co-operating parallel rollers between which the filaments are passed one roller having a series of spaced blades projecting from its surface; gaps being provided in this roller between successive blades to reduce the area of this roller in contact with the filaments at any given time.
Inventors
- 👤 Eric Ellis Lomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:32
CPC Classifications
D; D01; D01G; D01G1/00; D01G1/02; D01G1/04; C; C03; C03B; C03B37/00; C03B37/10; C03B37/16; Y; Y10; Y10T; Y10T83/00; Y10T83/465; Y10T83/4766; Y10T83/4795; Y10T83/483; Y10T83/4838; Y10T83/4841; Y10T83/929; Y10T83/9372; Y10T83/9396; Y10T83/9399; Y10T83/9457; Y10T83/9464
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
308 words
Apparatus for chopping continuous filaments comprising a rotatable chopper body having a pair of disc-shaped blade support members along the axis of rotation thereof, each of said support members having radially extending blade receiving slots in circumferentially spaced relationship, said slots of one of said support members being aligned with said slots on the other of said support members in planes passing through the axis of rotation, a plurality of chopper blades mounted in said slots and supported at their ends by said slots such that the cutting edges of said blades protrude from said slots to describe a cylinder of rotation of the diameter greater than the diameter of said support members, blade support plate means associated with each of said chopper blades and coextensive therewith, said blade support plate means comprising a base member against which the base of said blade is seated and a backing member against which a side of said blade is seated, said backing member including means engaging said blade and locking said blade against relative movement with respect to said support plate means, said blade and said support plate means being received in said slots, a pair of end plates on said chopper body for locking said blades against radial and axial movement, said end plates engaging said blade support plate means, a rotatable backing element having a resilient surface mounted on a parallel axis adjacent said chopper body and spaced from said chopper body such that there is interference between the periphery of said cylinder of rotation described by said cutting edges and said backing roller sufficient to enable said blade to chop filaments against said backing roller while direct contact between said chopper body and said backing roller is avoided, means for feeding continuous filaments between said chopper body and said backing roller, and means rotating said chopper body.
Claim 2
Dependent Claim
308 words
Apparatus for chopping continuous filaments comprising a rotatable chopper body having a pair of disc-shaped blade support members along the axis of rotation thereof, each of said support members having radially extending blade receiving slots in circumferentially spaced relationship, said slots of one of said support members being aligned with said slots on the other of said support members in planes passing through the axis of rotation, a plurality of chopper blades mounted in said slots and supported at their ends by said slots such that the cutting edges of said blades protrude from said slots to describe a cylinder of rotation of the diameter greater than the diameter of said support members, blade support plate means associated with each of said chopper blades and coextensive therewith, said blade support plate means comprising a base member against which the base of said blade is seated and a backing member against which a side of said blade is seated, said backing member including means engaging said blade and locking said blade against relative movement with respect to said support plate means, said blade and said support plate means being received in said slots, a pair of end plates on said chopper body for locking said blades against radial and axial movement, said end plates engaging said blade support plate means, a rotatable backing element having a resilient surface mounted on a parallel axis adjacent said chopper body and spaced from said chopper body such that there is interference between the periphery of said cylinder of rotation described by said cutting edges and said backing roller sufficient to enable said blade to chop filaments against said backing roller while direct contact between said chopper body and said backing roller is avoided, means for feeding continuous filaments between said chopper body and said backing roller, and means rotating said chopper body.
Claim 3
Dependent Claim
20 words
Apparatus as set forth in claim 1 wherein each of said blades is sandwiched between a pair of backing members.
Claim 4
Dependent Claim
47 words
Apparatus as set forth in claim 1 wherein each of said blades includes at least one opening therethrough and wherein said means engaging said blades includes projections on said backing plates for engaging said openings to lock said blade against movement relative to said support plate means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |