US3841815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for producing perforated sleeves
Assignee: IWB WIRTSCHAFTSBERATUNGS-ANSTALT A Co OF LIECHTENSTEIN
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Filing: 1972-11-30
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Granted: 1974-10-15
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Expires: 1992-11-30
Abstract
Abstract A machine for producing a tubular perforated, in particular netlike, sleeve by the extrusion of plastics material, more particularly a thermoplastics material, of the type comprising a cylindrical annular-slot extrusion head for forming a solidwalled tubular sleeve, and means for forming in this tubular sleeve perforations which are subsequently enlarged by transverse and/or longitudinal drawing of the sleeve, wherein the perforation forming means are constituted by one or more toothed rollers rotatable about the axis of the die in such manner that the teeth of the roller or rollers penetrate through the wall of the tubular sleeve after it has issued through the said extrusion head.
Inventors
- 👤 M Labarre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:18
CPC Classifications
B; B26; B26F; B26F1/00; B26F1/0015; B26F1/0038; B29; B29C; B29C48/00; B29C48/001; B29C48/002; B29C48/03; B29C48/09; B29C48/13; B29C48/25; B29C48/30; B29C48/32; B29C48/33; B29L; B29L2028/00
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
148 words
In a machine for producing a tubular perforated sleeve by extrusion of plastic material of the type having a cylindrical extrusion head having an annular slot for forming a solid-walled tubular sleeve during use, and means for enlarging perforations by at least one of transverse or longitudinal drawing of the sleeve, wherein the improvement comprises means for perforating the sleeve comprising at least one toothed roller mounted for rotation about an axis parallel to and spaced from the longitudinal axis of the cylindrical extrusion head in that the roller teeth penetrate through the tubular sleeve after the sleeve has issued from the extrusion head, means mounting said roller for rotation about the longitudinal axis of the extrusion head and means for effecting rotation of said roller about both the longitudinal axis of the extrusion head and its axis of rotation to perforate the sleeve with the rotating teeth.
Claim 2
Dependent Claim
148 words
In a machine for producing a tubular perforated sleeve by extrusion of plastic material of the type having a cylindrical extrusion head having an annular slot for forming a solid-walled tubular sleeve during use, and means for enlarging perforations by at least one of transverse or longitudinal drawing of the sleeve, wherein the improvement comprises means for perforating the sleeve comprising at least one toothed roller mounted for rotation about an axis parallel to and spaced from the longitudinal axis of the cylindrical extrusion head in that the roller teeth penetrate through the tubular sleeve after the sleeve has issued from the extrusion head, means mounting said roller for rotation about the longitudinal axis of the extrusion head and means for effecting rotation of said roller about both the longitudinal axis of the extrusion head and its axis of rotation to perforate the sleeve with the rotating teeth.
Claim 3
Dependent Claim
39 words
A machine as claimed in claim 1, wherein said means mounting said roller comprises a shaft journalled on the axis of the extrusion head and a support member integral with the shaft on which said roller is rotationally mounted.
Claim 4
Dependent Claim
56 words
A machine as claimed in claim 2, wherein said shaft is mounted for axial displacement in the extrusion head from a position in which the roller is not in contact with the extruded sleeve into a position in which the roller bears against the annular extrusion slot with the peripheral teeth extending through the annular slot.
Claim 5
Dependent Claim
24 words
A machine as claimed in claim 1, wherein said means for effecting rotation comprises pinion means for positively rotating the roller about its axis.
Claim 6
Dependent Claim
17 words
A machine as claimed in claim 1, wherein said roller has identical teeth having a rectangular configuration.
Claim 7
Dependent Claim
17 words
A machine as claimed in claim 1, wherein said roller has identical teeth having a pointed configuration.
Claim 8
Dependent Claim
36 words
A machine as claimed in claim 1, including a plurality of rollers, at least one having rectangular teeth and at least one having pointed teeth with a rectangular toothed roller alternating with a pointed toothed roller.
Claim 9
Dependent Claim
66 words
A machine as claimed in claim 1, wherein the roller is disposed at the level of the opening of the extrusion slot, and wherein the means for effecting rotation comprises a pinion having a pitch circle which is tangential to the extension of the outer and inner face of the extrusion slot and to the extension of the central cylindrical surface passing through the extrusion slot.
Claim 10
Dependent Claim
30 words
A machine as claimed in claim 8, wherein the at least one roller is integral in rotation with the pinion, and wherein a fixed toothed ring meshes with the pinion.
Claim 11
Dependent Claim
22 words
A machine according to claim 9, wherein the roller and pinion, together with the toothed ring are situated inside the tubular sleeve.
Claim 12
Dependent Claim
22 words
A machine according to claim 9, wherein the roller and pinion, together with the toothed ring are situated outside the tubular sleeve.
Claim 13
Dependent Claim
17 words
A machine as claimed in claim 1, wherein the roller has one circumferential section with no teeth.
Claim 14
Dependent Claim
66 words
In a machine for perforating an extruded tubular workpiece of the type having an extrusion head having an annular extruding slot for extruding a solid walled tubular workpiece during use, wherein the improvement comprises rotatable perforating means mounted adjacent said extrusion head for rotation around the circumference of the extruded workpiece for perforating said tube in response to the rotational movement of the rotatable perforating means.
Claim 15
Dependent Claim
66 words
In a machine for perforating an extruded tubular workpiece of the type having an extrusion head having an annular extruding slot for extruding a solid walled tubular workpiece during use, wherein the improvement comprises rotatable perforating means mounted adjacent said extrusion head for rotation around the circumference of the extruded workpiece for perforating said tube in response to the rotational movement of the rotatable perforating means.
Claim 16
Dependent Claim
76 words
In a machine according to claim 13, wherein said rotatable perforating means comprises at least one rotatably mounted toothed roller rotatable about an axis different from the longitudinal axis of the extruding slot and means mounting said roller in a perforating position wherein the teeth thereof penetrate the extruded workpiece during the rotation of the rotatable perforating means around the circumference of the extruded workpiece thereby effecting rotation of said roller about its axis of rotation.
Claim 17
Dependent Claim
31 words
A machine according to claim 14, wherein said means mounting said roller in said perforating position further comprises means mounting said roller for movement into and out of said perforating position.
Claim 18
Dependent Claim
37 words
A machine according to claim 14, wherein said rotatable perforating means further comprises means for positively driving said roller about its axis of rotation in response to the rotation thereof around the circumference of the extruded workpiece.
Claim 19
Dependent Claim
57 words
A machine according to claim 16, wherein said means for positively driving said roller comprises a shaft integrally connected to the axis of said roller, and a toother gear fixedly connected to said roller and rotatable therewith about axis of rotation and a pinion gear fixedly connected to the extrusion head and meshing with said toothed gear.
Claim 20
Dependent Claim
23 words
A machine according to claim 17, wherein said roller and said pinion gear are rotated around the outer circumference of the extruded workpiece.
Claim 21
Dependent Claim
22 words
A machine according to claim 17, wherein said roller and said pinion gear rotate about the inner circumference of the extruded workpiece.
Claim 22
Dependent Claim
14 words
A maching according to claim 14, wherein the roller teeth have a rectangular configuration.
Claim 23
Dependent Claim
14 words
A machine according to claim 14, wherein the roller teeth have a pointed configuration.
Claim 24
Dependent Claim
41 words
A machine according to claim 14, compriSing a plurality of rollers wherein at least one has teeth having a rectangular configuration and at least one has teeth having a pointed configuration and wherein the two types of rollers are alternately positioned.
Claim 25
Dependent Claim
16 words
A machine according to claim 14, wherein said roller has a circumferential portion having no teeth.
Claim 26
Dependent Claim
71 words
A machine according to claim 14, wherein said means mounting said roller in said perforating position comprises a rotatably driven shaft having its longitudinal axis colinear with the longitudinal axis of the extrusion slot, a discal member coaxially mounted around said shaft and rotatable therewith and on which said roller is rotatably mounted and wherein the axis thereof is parallel to and spaced from the longitudinal axis of the extruding slot.
Claim 27
Dependent Claim
32 words
A machine according to claim 23, further comprising means mounting said shaft for displacement along its longitudinal axis to effect the movement of said roller into and out of said perforating position.
Claim 28
Dependent Claim
21 words
In a machine according to claim 13, wherein said rotatable perforating means rotates around the inner circumference of the extruded workpiece.
Claim 29
Dependent Claim
21 words
In a machine according to claim 13, wherein said rotatable perforating means rotates around the outer circumference of the extruded workpiece.
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |