US3766606A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forwarding tow
Assignee: Van Dorn Co
•
Filing: 1972-04-19
•
Granted: 1973-10-23
•
Expires: 1992-04-19
Abstract
Abstract A fluid jet apparatus for receiving a ribbon of parallel continuous filaments, then heating and spreading the filaments for deposit on a moving surface as a nonwoven web includes an adjustable diffuser connected to the outlet end of the jet. The diffuser comprises a pair of spaced plates, adjustable with respect to each other, mounted to the outlet end of the jet. The plates are arranged to form aspiration slots at one end between the jet and the plates. The slots open into a central converging passage formed by the plates for confining and diverting gas out the open sides of the diffuser. The particular structural arrangement of the plates with respect to the jet permits development of static pressure in the diffuser which in turn causes a large percentage of jet fluid to exit from the open edges of the diffuser, generally parallel to the moving laydown surface, while less fluid accompanies the filaments to the laydown surface to reduce web disturbance.
Inventors
- 👤 W Piper
- 👤 A Porter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:18
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/02; D04H3/03; D01; D01D; D01D10/00; D01D10/04; D01D10/0436; D01D10/0481
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
182 words
In a filament forwarding apparatus including a jet having inlet and outlet ends connected by a filament passage of generally rectangular cross section, a diffuser comprising: a pair of spaced plates mounted to the outlet end of the jet, one end of the plates extending above said outlet end and being spaced therefrom to form two generally rectangular slots, the other end extended below said outlet said plates forming an open sIded diffuser passage in axial alignment with said jet filament passage, said slots being in communication with said diffuser passage and the outside of the jet, said diffuser passage having successive curved, straight and converging lengths, said curved length being adjacent the outlet end of the jet, said converging length terminating at said exit slot, the filaments being forwarded through the jet and diffuser passages by a gas, said gas developing static pressure in the diffuser; and means for pivotally mounting one of said plates to the outlet end of the jet for swinging movement toward and away from the other plate to change the size of the said exit slot.
Claim 2
Dependent Claim
182 words
In a filament forwarding apparatus including a jet having inlet and outlet ends connected by a filament passage of generally rectangular cross section, a diffuser comprising: a pair of spaced plates mounted to the outlet end of the jet, one end of the plates extending above said outlet end and being spaced therefrom to form two generally rectangular slots, the other end extended below said outlet said plates forming an open sIded diffuser passage in axial alignment with said jet filament passage, said slots being in communication with said diffuser passage and the outside of the jet, said diffuser passage having successive curved, straight and converging lengths, said curved length being adjacent the outlet end of the jet, said converging length terminating at said exit slot, the filaments being forwarded through the jet and diffuser passages by a gas, said gas developing static pressure in the diffuser; and means for pivotally mounting one of said plates to the outlet end of the jet for swinging movement toward and away from the other plate to change the size of the said exit slot.
Claim 3
Dependent Claim
23 words
The apparatus as defined in claim 1, said exit slot having a width less than the combined widths of said two rectangular slots.
Claim 4
Dependent Claim
24 words
The apparatus as defined in claim 1, including means for moving said pivotally mounted plate according to the static pressure in the diffuser passage.
Claim 5
Dependent Claim
65 words
The apparatus as defined in claim 3, said means for moving according to the forwarding conditions in the diffuser passage comprising: a pressure sensor in communication with said passage; an air cylinder engaging said one plate adjacent said exit slot; a source of pressurized air connected to said cylinder; and means for cutting air off from said cylinder, said means being actuated by said sensor.
Claim 6
Dependent Claim
150 words
In a filament forwarding apparatus including a jet having inlet and outlet ends connected by a filament passage of generally rectangular cross section, a diffuser comprising: a pair of spaced plates mounted to the outlet end of the jet, said plates forming an open sided diffuser passage in axial alignment with said jet filament passage, said diffuser passage terminating in an exit slot; means for pivotally mounting one of said plates to the outlet end of the jet for swinging movement toward and away from the other plate to change the size of the exit slot; a pressure sensor in communication with said diffuser passage; an air cylinder connected to said one plate adjacent said exit slot; and a control means connected to said cylinder for admitting and releasing air to said cylinder for operating said cylinder to move said one plate, said control means being actuated by said sensor.
Claim 7
Dependent Claim
150 words
In a filament forwarding apparatus including a jet having inlet and outlet ends connected by a filament passage of generally rectangular cross section, a diffuser comprising: a pair of spaced plates mounted to the outlet end of the jet, said plates forming an open sided diffuser passage in axial alignment with said jet filament passage, said diffuser passage terminating in an exit slot; means for pivotally mounting one of said plates to the outlet end of the jet for swinging movement toward and away from the other plate to change the size of the exit slot; a pressure sensor in communication with said diffuser passage; an air cylinder connected to said one plate adjacent said exit slot; and a control means connected to said cylinder for admitting and releasing air to said cylinder for operating said cylinder to move said one plate, said control means being actuated by said sensor.
References Cited (Backward Citations)
US3286896A
Cited
US3325906A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |