GB1391471A - Heater for use in the manufacture of plastics filaments - Google Patents
Heater for use in the manufacture of plastics filamentsInfo
- Publication number
- GB1391471A GB1391471A GB1517872A GB1517872A GB1391471A GB 1391471 A GB1391471 A GB 1391471A GB 1517872 A GB1517872 A GB 1517872A GB 1517872 A GB1517872 A GB 1517872A GB 1391471 A GB1391471 A GB 1391471A
- Authority
- GB
- United Kingdom
- Prior art keywords
- heater
- filaments
- spinneret
- opening
- diameter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/084—Heating filaments, threads or the like, leaving the spinnerettes
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
1391471 Heater for spun filaments HOECHST AG 30 March 1972 [30 March 1971] 15178/72 Heading B5B A heater for use in the manufacture of spun plastics filaments comprises two portions 1 and 2 each having the shape of a truncated cone, attached to each other at their larger ends. Lower part 2 is heated while the inside wall of of the upper part 1 reflects the heat emitted by the lower part. The lower opening 3 of the heater is protected by an annular screen 4 preventing air blown on to the filaments after they have left the heater passing upwardly through the heater and entering the space below the spinneret; suitably the diameter d, of the opening in the screen is only 5 to 30 mm. larger than the diameter d of the bundle of filaments. The length L of the heater is from 1À0 to 2.5 times the diamter d 4 of the opening in the upper part of the heater, and the cross-sectional area at the largest diameter d 3 of the heater is preferably at least twice the cross-sectional area of the bundle of filaments. The biconical shape of the heater allows concentric thermal radiation and ensures that only a minor part of the thermal radiation reaches the spinneret, the major part being reflected by the conical reflector into the space below the spinneret. To facilitate such reflection the reflector 1 is provided with a highly polished surface or coated with a reflecting foil. The heating elements of radiator 2 preferably consist of ceramic plates with inserted heating spirals. The use of the heater enables filaments of a very low degree of pre-orientation to be obtained, so that higher draw ratios can be used in stretching, and filaments of higher strength produced. Alternatively the throughput of molten material can be increased, since the higher pre-orientation resulting from a higher draw-off speed can be compensated for in the heater. The meltspinning of polyesters is exemplified.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2115312A DE2115312C3 (en) | 1971-03-30 | 1971-03-30 | Heatable spinning shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1391471A true GB1391471A (en) | 1975-04-23 |
Family
ID=5803215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1517872A Expired GB1391471A (en) | 1971-03-30 | 1972-03-30 | Heater for use in the manufacture of plastics filaments |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US3741716A (en) |
| BE (1) | BE781488A (en) |
| CA (1) | CA964422A (en) |
| CH (1) | CH539691A (en) |
| DD (1) | DD95903A5 (en) |
| DE (1) | DE2115312C3 (en) |
| FR (1) | FR2132171B1 (en) |
| GB (1) | GB1391471A (en) |
| IT (1) | IT950854B (en) |
| NL (1) | NL7203995A (en) |
| RO (1) | RO64788A (en) |
Families Citing this family (42)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4036070A1 (en) * | 1990-11-13 | 1992-05-14 | Hoechst Ag | HEATING DEVICE AND METHOD FOR THE PRODUCTION OF QUICKLY SPONSED FILAMENTS |
| BR0107280A (en) | 2001-09-17 | 2004-03-23 | Rhodia Poliamida Ltda | Microfibers for reinforcement of inorganic matrices, such as cement, mortar. plaster and concrete, polyamide-based microfibres for inorganic matrix reinforcement, process for obtaining polyamide-based microfibres for inorganic matrix reinforcement and fiber-cement products |
| GB0522968D0 (en) | 2005-11-11 | 2005-12-21 | Popovich Milan M | Holographic illumination device |
| GB0718706D0 (en) | 2007-09-25 | 2007-11-07 | Creative Physics Ltd | Method and apparatus for reducing laser speckle |
| US9335604B2 (en) | 2013-12-11 | 2016-05-10 | Milan Momcilo Popovich | Holographic waveguide display |
| US11726332B2 (en) | 2009-04-27 | 2023-08-15 | Digilens Inc. | Diffractive projection apparatus |
| US9341846B2 (en) | 2012-04-25 | 2016-05-17 | Rockwell Collins Inc. | Holographic wide angle display |
| WO2012136970A1 (en) | 2011-04-07 | 2012-10-11 | Milan Momcilo Popovich | Laser despeckler based on angular diversity |
| US20140204455A1 (en) | 2011-08-24 | 2014-07-24 | Milan Momcilo Popovich | Wearable data display |
| WO2016020630A2 (en) | 2014-08-08 | 2016-02-11 | Milan Momcilo Popovich | Waveguide laser illuminator incorporating a despeckler |
| US10670876B2 (en) | 2011-08-24 | 2020-06-02 | Digilens Inc. | Waveguide laser illuminator incorporating a despeckler |
| WO2013102759A2 (en) | 2012-01-06 | 2013-07-11 | Milan Momcilo Popovich | Contact image sensor using switchable bragg gratings |
| WO2013167864A1 (en) | 2012-05-11 | 2013-11-14 | Milan Momcilo Popovich | Apparatus for eye tracking |
| US9933684B2 (en) * | 2012-11-16 | 2018-04-03 | Rockwell Collins, Inc. | Transparent waveguide display providing upper and lower fields of view having a specific light output aperture configuration |
| WO2014188149A1 (en) | 2013-05-20 | 2014-11-27 | Milan Momcilo Popovich | Holographic waveguide eye tracker |
| US9727772B2 (en) | 2013-07-31 | 2017-08-08 | Digilens, Inc. | Method and apparatus for contact image sensing |
| US10359736B2 (en) | 2014-08-08 | 2019-07-23 | Digilens Inc. | Method for holographic mastering and replication |
| US10241330B2 (en) | 2014-09-19 | 2019-03-26 | Digilens, Inc. | Method and apparatus for generating input images for holographic waveguide displays |
| WO2016046514A1 (en) | 2014-09-26 | 2016-03-31 | LOKOVIC, Kimberly, Sun | Holographic waveguide opticaltracker |
| CN107873086B (en) | 2015-01-12 | 2020-03-20 | 迪吉伦斯公司 | Environmentally isolated waveguide display |
| WO2016113533A2 (en) | 2015-01-12 | 2016-07-21 | Milan Momcilo Popovich | Holographic waveguide light field displays |
| US10330777B2 (en) | 2015-01-20 | 2019-06-25 | Digilens Inc. | Holographic waveguide lidar |
| US9632226B2 (en) | 2015-02-12 | 2017-04-25 | Digilens Inc. | Waveguide grating device |
| US10459145B2 (en) | 2015-03-16 | 2019-10-29 | Digilens Inc. | Waveguide device incorporating a light pipe |
| US10591756B2 (en) | 2015-03-31 | 2020-03-17 | Digilens Inc. | Method and apparatus for contact image sensing |
| WO2017060665A1 (en) | 2015-10-05 | 2017-04-13 | Milan Momcilo Popovich | Waveguide display |
| CN109073889B (en) | 2016-02-04 | 2021-04-27 | 迪吉伦斯公司 | Holographic waveguide optical tracker |
| WO2017162999A1 (en) | 2016-03-24 | 2017-09-28 | Popovich Milan Momcilo | Method and apparatus for providing a polarization selective holographic waveguide device |
| JP6734933B2 (en) | 2016-04-11 | 2020-08-05 | ディジレンズ インコーポレイテッド | Holographic Waveguide Device for Structured Light Projection |
| WO2018102834A2 (en) | 2016-12-02 | 2018-06-07 | Digilens, Inc. | Waveguide device with uniform output illumination |
| WO2018129398A1 (en) | 2017-01-05 | 2018-07-12 | Digilens, Inc. | Wearable heads up displays |
| JP7399084B2 (en) | 2017-10-16 | 2023-12-15 | ディジレンズ インコーポレイテッド | System and method for doubling the image resolution of pixelated displays |
| JP7404243B2 (en) | 2018-01-08 | 2023-12-25 | ディジレンズ インコーポレイテッド | Systems and methods for high-throughput recording of holographic gratings in waveguide cells |
| WO2019136476A1 (en) | 2018-01-08 | 2019-07-11 | Digilens, Inc. | Waveguide architectures and related methods of manufacturing |
| US20190212588A1 (en) | 2018-01-08 | 2019-07-11 | Digilens, Inc. | Systems and Methods for Manufacturing Waveguide Cells |
| EP4372451A3 (en) | 2018-03-16 | 2024-08-14 | Digilens Inc. | Holographic waveguides incorporating birefringence control and methods for their fabrication |
| US11402801B2 (en) | 2018-07-25 | 2022-08-02 | Digilens Inc. | Systems and methods for fabricating a multilayer optical structure |
| EP3924759A4 (en) | 2019-02-15 | 2022-12-28 | Digilens Inc. | Methods and apparatuses for providing a holographic waveguide display using integrated gratings |
| JP2022525165A (en) | 2019-03-12 | 2022-05-11 | ディジレンズ インコーポレイテッド | Holographic Waveguide Backlights and Related Manufacturing Methods |
| US20200386947A1 (en) | 2019-06-07 | 2020-12-10 | Digilens Inc. | Waveguides Incorporating Transmissive and Reflective Gratings and Related Methods of Manufacturing |
| EP4004646A4 (en) | 2019-07-29 | 2023-09-06 | Digilens Inc. | Methods and apparatus for multiplying the image resolution and field-of-view of a pixelated display |
| KR20220054386A (en) | 2019-08-29 | 2022-05-02 | 디지렌즈 인코포레이티드. | Vacuum Bragg grating and manufacturing method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1881331A (en) * | 1930-12-24 | 1932-10-04 | Smith Wiloughby Statham | Apparatus for the continuous heat treatment of metals or alloys |
| US3174537A (en) * | 1959-06-30 | 1965-03-23 | Thompson Ramo Wooldridge Inc | Electromagnetic radiant energy response apparatus |
| US3285333A (en) * | 1962-10-17 | 1966-11-15 | Garrett Corp | Geometrically-spectrally selective radiator |
-
1971
- 1971-03-30 DE DE2115312A patent/DE2115312C3/en not_active Expired
-
1972
- 1972-03-24 NL NL7203995A patent/NL7203995A/xx not_active Application Discontinuation
- 1972-03-28 IT IT22525/72A patent/IT950854B/en active
- 1972-03-28 RO RO7270299A patent/RO64788A/en unknown
- 1972-03-28 US US00238846A patent/US3741716A/en not_active Expired - Lifetime
- 1972-03-28 CH CH459372A patent/CH539691A/en not_active IP Right Cessation
- 1972-03-29 FR FR7211001A patent/FR2132171B1/fr not_active Expired
- 1972-03-29 CA CA138,412A patent/CA964422A/en not_active Expired
- 1972-03-30 DD DD161933A patent/DD95903A5/xx unknown
- 1972-03-30 BE BE781488A patent/BE781488A/en unknown
- 1972-03-30 GB GB1517872A patent/GB1391471A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| RO64788A (en) | 1982-02-26 |
| BE781488A (en) | 1972-10-02 |
| DE2115312B2 (en) | 1974-10-31 |
| DD95903A5 (en) | 1973-02-20 |
| DE2115312A1 (en) | 1972-10-19 |
| NL7203995A (en) | 1972-10-03 |
| FR2132171B1 (en) | 1975-10-24 |
| CA964422A (en) | 1975-03-18 |
| IT950854B (en) | 1973-06-20 |
| FR2132171A1 (en) | 1972-11-17 |
| US3741716A (en) | 1973-06-26 |
| CH539691A (en) | 1973-07-31 |
| DE2115312C3 (en) | 1975-06-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |