US3758247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for making flat cables by extrusion
Assignee: International Business Machines Corp
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Filing: 1971-04-23
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Granted: 1973-09-11
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Expires: 1991-04-23
Abstract
Abstract Crosshead die for coating flat cables, in which the melt flow is split into two partial flows and two diversion rollers with helical grooves are provided to guide and divert the partial flows after conversion of their cross-sections.
Inventors
- 👤 A Deegen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:51
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/08; B; B29; B29C; B29C48/00; B29C48/001; B29C48/0013; B29C48/0014; B29C48/03; B29C48/07; B29C48/15; B29C48/156; B29C48/16; B29C48/18; B29C48/21; B29C48/25; B29C48/30; B29C48/345; B29C48/36; B29C48/50; B29C48/695; B29C48/70; H01B13/00; H01B13/06; H01B13/14; B29C48/05; B29C48/06; B29C48/08; B29C48/09; B29C48/10
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
257 words
In apparatus for making flat cable by extruding a sheath of plastic material onto a plurality of parallel coplanar moving cores including extrusion means for producing a single melt flow of circular cross-section and a crosshead die, said crosshead die comprising die block means, guide means associated with said die block means for guiding said plurality of coplanar cores at an angle across the direction of motion of said single melt flow, channel means formed in said die block means having a first channel portion connected to said extrusion means for splitting said single melt flow into two separate melt flows and for directing said two separate flows to opposite sides of and at said angle to said coplanar cores, said channel means in said first channel portion having successively circular then rectangular cross-sections said channel means having a second channel portion formed in said die block means for directing said two separate flows on opposite sides of and in a direction parallel with said coplanar cores, said channel means in said second channel portion having a rectangular cross-section and diversion means associated with said die block means and coacting with said channel means thereof for diverting said separate melt flows from said angular to said parallel directions of flow, said diversion means comprises cylindrical diversion pins locatable in said die block means, said diversion pins having helical groove means connecting said first portion of said channel means at the rectangular crosssection thereof with said second portion of said channel means of said die block channel means.
Claim 2
Dependent Claim
257 words
In apparatus for making flat cable by extruding a sheath of plastic material onto a plurality of parallel coplanar moving cores including extrusion means for producing a single melt flow of circular cross-section and a crosshead die, said crosshead die comprising die block means, guide means associated with said die block means for guiding said plurality of coplanar cores at an angle across the direction of motion of said single melt flow, channel means formed in said die block means having a first channel portion connected to said extrusion means for splitting said single melt flow into two separate melt flows and for directing said two separate flows to opposite sides of and at said angle to said coplanar cores, said channel means in said first channel portion having successively circular then rectangular cross-sections said channel means having a second channel portion formed in said die block means for directing said two separate flows on opposite sides of and in a direction parallel with said coplanar cores, said channel means in said second channel portion having a rectangular cross-section and diversion means associated with said die block means and coacting with said channel means thereof for diverting said separate melt flows from said angular to said parallel directions of flow, said diversion means comprises cylindrical diversion pins locatable in said die block means, said diversion pins having helical groove means connecting said first portion of said channel means at the rectangular crosssection thereof with said second portion of said channel means of said die block channel means.
Claim 3
Dependent Claim
25 words
In apparatus for making flat cables, a die in accordance with claim 1 in which said diversion pins have helical grooves in the periphery thereof.
Claim 4
Dependent Claim
144 words
In apparatus for making flat cable, a die in accordance with claim 1 in which said die block means comprises: first and second die block members located on opposite sides of said array of cores, said die block members being relatively movable to permit opening of said die for removal or insertion of one or more of said cores, said die block members being in spaced apart relation to form a passage for said cores therebetween, guide means carried by each of said die block members within said passage and mutually coacting to hold said plural moving cores in predetermined parallel coplanar array, said guide means coacting with said die block members to form rectangular cross-sectional channels on opposite sides of said cores for extruding said dual flat plastic melt flows onto said cores as they move through said passage and said wire guides.
Claim 5
Dependent Claim
77 words
In apparatus for making flat cable, a die in accordance with claim 3 in which said guides comprise: first and second guide plates, said guide plates having a base portion and an extension portion, said base portion being attached to said die block members and said extension portions extending in cantilever fashion relative to said die block members, said extension portions coacting with said block members to form said rectangular channel means for said dual melt flows.
Claim 6
Dependent Claim
31 words
In apparatus for making flat cable, a die in accordance with claim 3 in which said die block members are hingedly connected for relative movement to permit opening of said die.
Claim 7
Dependent Claim
25 words
In apparatus for making flat cable, a crosshead die in accordance with claim 2 in which said diversion pins have helical grooves of rectangular cross-section.
Claim 8
Dependent Claim
34 words
In apparatus for making flat cable, a crosshead die in accordance with claim 3 in which said helical groove in said diversion pins is formed over an arc of the periphery of said pins.
Claim 9
Dependent Claim
50 words
In apparatus for making flat cable, a crosshead die in accordance with claim 4 in which said diversion pins are arranged in said die block means such that the axis of said diversion pins relative to the axis of the single melt flow forms an angle no greater than 75*.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |