US3869240A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic films
Assignee: James Mackie and Sons Ltd
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Filing: 1973-11-01
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Granted: 1975-03-04
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Expires: 1993-11-01
Abstract
Abstract Apparatus for the profiling of films of synthetic organic polymers comprises a profiling comb and a roller which cooperates with it to form a nip for the passage of film to be profiled, the two members being yieldingly biased together and a spacer is provided which bears against the surface of the roller and is connected to the profiling comb in such a way that any deviations of the roller surface from the concentric react against the spacer so as to produce relative movement between the axis of the roller and the profiling comb and thus maintain the width of the nip between the roller surface and the comb at a pre-determined value. The spacer is conveniently in the form of either one or two pairs of low-friction runners, each of which may be in the form of a small, light wheel turning in frictionless bearings. In order to provide adjustment of the nip between the comb and the roller according to the thickness of film and the depth of profiling required, the profiling comb is adjustably mounted within a frame to which the spacer is connected. This frame may comprise a pair of end plates between which the comb is supported and which are interconnected by bars or rods, the end plates carrying two pairs of runners engaging the surface of the roller. The comb may be supported by a bar carried in mountings capable of both linear adjustment towards and away from the roller and also of angular adjustment substantially about the axis of the bar. The comb preferably comprises a number of equally spaced pins extending from a body and arrangements are described whereby the regularity and linearity of the tips of the pins may be adjusted.
Inventors
- 👤 John K P Mackie
- 👤 Samuel Mcmeekin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:51
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/42; D01D5/423
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
146 words
Apparatus for the profiling of films of synthetic organic polymers comprising a profiling member and a member co-operating with said profiling member to form a nip for the passage of film to be profiled, one of the said members being in the form of a roller having an axis and the other said member being static, means mounting said members in co-operating relationship whereby said members are yieldingly biased together and a spacer member, said spacer member bearing against the surface of said roller and being connected to said static member in such a way that any deviations of said roller surface from the concentric react against said spacer member so as to produce relative movement between said axis of said roller and said static member whereby to maintain the width of said nip between said roller surface and said static member at a predetermined value.
Claim 2
Dependent Claim
146 words
Apparatus for the profiling of films of synthetic organic polymers comprising a profiling member and a member co-operating with said profiling member to form a nip for the passage of film to be profiled, one of the said members being in the form of a roller having an axis and the other said member being static, means mounting said members in co-operating relationship whereby said members are yieldingly biased together and a spacer member, said spacer member bearing against the surface of said roller and being connected to said static member in such a way that any deviations of said roller surface from the concentric react against said spacer member so as to produce relative movement between said axis of said roller and said static member whereby to maintain the width of said nip between said roller surface and said static member at a predetermined value.
Claim 3
Dependent Claim
14 words
Apparatus according to claim 1, in which said static member is a profiling comb.
Claim 4
Dependent Claim
24 words
Apparatus according to claim 1, in which said axis of said roller is fixed and said mounting means permits yielding of said static member.
Claim 5
Dependent Claim
19 words
Apparatus according to claim 3, in which said roller is constituted by a chill roller of an extrusion die.
Claim 6
Dependent Claim
16 words
Apparatus according to claim 3 and including a tension spring for biasing said two members together.
Claim 7
Dependent Claim
31 words
Apparatus according to claim 1 and including a frame to which said spacer member is connected and means adjustably mounting said static member for movement towards and away from said roller.
Claim 8
Dependent Claim
36 words
Apparatus according to claim 6 in which said spacer member comprises at least one pair of low-friction runners, the runners of said pair being spaced apart in a direction parallel with the axis of said roller.
Claim 9
Dependent Claim
26 words
Apparatus according to claim 7, in which each said runner is in the form of a small, light wheel and including frictionless bearings for said wheel.
Claim 10
Dependent Claim
160 words
Apparatus for the profiling of films of synthetic organic polymers comprising a profiling comb, a roller having an axis, means mounting said comb and said roller in co-operating relationship to form a nip for the passage of film to be profiled, said mounting means for said comb comprising a frame having a pair of end plates, rods connecting said end plates and means adjustably mounting said comb between said end plates for movement towards and away from said roller, means yieldingly biasing said frame towards said roller and a spacer member, said spacer member bearing against the surface of said roller and being connected to said frame in such a way that any deviations of said roller surface from the concentric react against said spacer member so as to produce relative movement between said axis of said roller and said comb whereby to maintain the width of said nip between said roller surface and said comb at a predetermined value.
Claim 11
Dependent Claim
160 words
Apparatus for the profiling of films of synthetic organic polymers comprising a profiling comb, a roller having an axis, means mounting said comb and said roller in co-operating relationship to form a nip for the passage of film to be profiled, said mounting means for said comb comprising a frame having a pair of end plates, rods connecting said end plates and means adjustably mounting said comb between said end plates for movement towards and away from said roller, means yieldingly biasing said frame towards said roller and a spacer member, said spacer member bearing against the surface of said roller and being connected to said frame in such a way that any deviations of said roller surface from the concentric react against said spacer member so as to produce relative movement between said axis of said roller and said comb whereby to maintain the width of said nip between said roller surface and said comb at a predetermined value.
Claim 12
Dependent Claim
36 words
Apparatus according to claim 9 in which said spacer member comprises at least one pair of low-friction runners, the runners of said pair being spaced apart in a direction parallel with the axis of said roller.
Claim 13
Dependent Claim
26 words
AppaRatus according to claim 10, in which each said runner is in the form of a small, light wheel and including frictionless bearings for said wheel.
Claim 14
Dependent Claim
48 words
Apparatus according to claim 9 including a bar supporting said comb, mountings carrying said bar and means for adjusting said mountings whereby said bar is capable both of linear adjustment towards and away from said roller and also of angular adjustment substantially about the axis of said bar.
Claim 15
Dependent Claim
63 words
Apparatus according to claim 9, wherein said comb comprises a body, a plurality of equally spaced pins having tips, said pins extending from said body and a bracing bar having accurately pitched grooves along its length corresponding to the correct spacing of said pins, said bracing bar bearing against said pins close to said tips, whereby said pins are located by said grooves.
Claim 16
Dependent Claim
69 words
Apparatus according to claim 13, in which said support bar is formed with a plurality of uniformly spaced holes, alternate holes being plain and tapped, a plurality of screws in said holes, alternate screws engaging said tapped holes and abutting the surface of said bracing bar and intervening screws passing through said plain holes and into tapped holes formed in said bracing bar, whereby said bracing bar is adjustable.
Claim 17
Dependent Claim
68 words
Apparatus according to claim 9, wherein said comb comprises a body, a plurality of equally spaced pins extending from said body, said support bar being formed with a plurality of plain holes, a plurality of screws passing through said plain holes and into tapped holes in said body, and a cover plate overlying said screws whereby said screws are trapped between said support bar and said cover plate.
Claim 18
Dependent Claim
24 words
Apparatus according to claim 9 and including a bracket whereby said frame is supported for pivotal movement towards and away from said co-operating roller.
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) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |