Patent US4900967A successfully refreshed from Google Patents.
Patent US3561306A successfully refreshed from Google Patents.
US3561306A
Expired / Lapsed
US
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Method and apparatus for treating tubular fabrics
Assignee: Individual
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Filing: 1968-01-04
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Granted: 1971-02-09
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Expires: 1988-01-04
Abstract
Abstract A rotary slitting knife mounted on a telescopically adjustable table for slitting tubular fabrics in combination with a fabric opening frame of three-dimensional triangular configuration. An uncurler device at the discharge of the opening frame including a pair of continuous belts extending transversely at each edge of the opened web of tubular fabric and in functional engagement therewith, and in combination with air nozzles pointed outwardly and in the direction of the edge of the fabric and a pair of driven rollers for rolling up the fabric.
Inventors
- 👤 Edward I Aronoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:49
CPC Classifications
D; D06; D06H; D06H7/00; D06H7/04; D06H7/08; B; B65; B65H; B65H2301/00; B65H2301/40; B65H2301/41; B65H2301/414; B65H2301/4148; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/0405; Y10T83/0419; Y10T83/0424; Y10T83/0448; Y10T83/202; Y10T83/2066; Y10T83/323
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
94 words
A method of opening a tubular fabric comprising the steps of: advancing the tubular fabric in a flattened condition; slitting one fold of the flattened tubular fabric; maintaining transverse tension as it is being slit; opening the fabric into a web; maintaining the edges of said web in a flattened condition; and continUously rolling said web of fabric by imparting rolling movement to the fabric in the rolling zone and a rolling core is fed to the rolling zone with the web of fabric and the fabric is made to roll on the core.
Claim 2
Independent Claim
94 words
A method of opening a tubular fabric comprising the steps of: advancing the tubular fabric in a flattened condition; slitting one fold of the flattened tubular fabric; maintaining transverse tension as it is being slit; opening the fabric into a web; maintaining the edges of said web in a flattened condition; and continUously rolling said web of fabric by imparting rolling movement to the fabric in the rolling zone and a rolling core is fed to the rolling zone with the web of fabric and the fabric is made to roll on the core.
Claim 3
Dependent Claim
44 words
A method as defined in claim 1 wherein the edges are maintained in a flattened condition by continuously applying a frictional force to the edge of the fabric in a direction laterally of the path of travel of the advancing fabric and outwards thereof.
Claim 4
Dependent Claim
29 words
A method as defined in claim 1 wherein the edges are also maintained in a flattened condition by blowing air under pressure outwardly towards the edges of the fabric.
Claim 5
Dependent Claim
49 words
A method as defined in claim 1 wherein as the roll on the core is completed the core and rolled fabric is removed from the rolling zone and the fabric is cut and another core is simultaneously fed to the rolling zone with the continuously advancing web of fabric.
Claim 6
Independent Claim
100 words
An apparatus for opening a continuous tubular fabric which has been flattened in subsequent treatment and includes a pair of opposed fold edges, a flat supporting surface for supporting the flattened tubular fabric in a substantially horizontal plane, means for advancing the fabric across the supporting surface, means for cutting one fold edge of the flattened fabric, and a stretching frame projecting inwardly from the cut fold edge downstream of the cutting means and contacting the inner opposite fold edge at a point opposite the cutting means for retaining substantial transverse tension on the fabric as it is being cut.
Claim 7
Independent Claim
100 words
An apparatus for opening a continuous tubular fabric which has been flattened in subsequent treatment and includes a pair of opposed fold edges, a flat supporting surface for supporting the flattened tubular fabric in a substantially horizontal plane, means for advancing the fabric across the supporting surface, means for cutting one fold edge of the flattened fabric, and a stretching frame projecting inwardly from the cut fold edge downstream of the cutting means and contacting the inner opposite fold edge at a point opposite the cutting means for retaining substantial transverse tension on the fabric as it is being cut.
Claim 8
Independent Claim
95 words
An apparatus for opening a continuous tubular fabric which has been flattened in subsequent treatment and includes a pair of opposed fold edges, a flat supporting surface for supporting the flattened tubular fabric in a substantial horizontal plane, the flat supporting surface comprises a table having a fixed, smooth top surface and an extension surface telescopically operable with the fixed surface, means for advancing the fabric across the supporting surface, means for cutting one fold edge of the flattened fabric, and means for retaining substantial transverse tension on the fabric as it is being cut.
Claim 9
Independent Claim
95 words
An apparatus for opening a continuous tubular fabric which has been flattened in subsequent treatment and includes a pair of opposed fold edges, a flat supporting surface for supporting the flattened tubular fabric in a substantial horizontal plane, the flat supporting surface comprises a table having a fixed, smooth top surface and an extension surface telescopically operable with the fixed surface, means for advancing the fabric across the supporting surface, means for cutting one fold edge of the flattened fabric, and means for retaining substantial transverse tension on the fabric as it is being cut.
Claim 10
Dependent Claim
49 words
An apparatus as defined in claim 6 wherein the extension is adjustably movable with respect to the fixed surface to effectively widen the surface of the table and a rotary cutting means is provided at one edge of the extension table and is adapted to be adjustably moved therewith.
Claim 11
Dependent Claim
37 words
An apparatus as defined in claim 7 wherein the extension surface and the cutting means are mounted on a bracket which is adapted for adjustable lateral movement with respect to the path of travel of the fabric.
Claim 12
Dependent Claim
58 words
An apparatus as defined in claim 1 wherein the cutting means comprises a rotary disc which is substantially in a horizontal plane coincident with the plane of the flattened tubular fabric and includes a finger in close proximity with the rotary disc blade for engaging the fold edge of the tubular fabric and pressing it against the disc.
Claim 13
Dependent Claim
56 words
An apparatus as defined in claim 5 wherein the means for maintaining substantial transverse tension on the fabric as it is being cut is a wire frame extending inwardly of the tubular fabric on one side of the rotary cutting means and abuts against the inner side of the fold edge from opposite the cutting means.
Claim 14
Dependent Claim
32 words
An apparatus as defined in claim 6 wherein the means for advancing the fabric across the supporting table includes a pair of driven rollers at the discharge end of the supporting surface.
Claim 15
Independent Claim
97 words
An apparatus for opening a flattened tubular fabric which has a pair of opposed edges with one of the fold edges being slit and presenting two free edges, means for advancing and supporting a length of said fabric, means beneath the advancing means forming a point for engaging an inner side of the fabric at the unslitted fold edge, said means including a pair of diverging legs extending downwardly at an angle of divergence equal to or less than 90*, the legs defining a plane parallel to the axis oF direction of movement of the advancing fabric.
Claim 16
Independent Claim
97 words
An apparatus for opening a flattened tubular fabric which has a pair of opposed edges with one of the fold edges being slit and presenting two free edges, means for advancing and supporting a length of said fabric, means beneath the advancing means forming a point for engaging an inner side of the fabric at the unslitted fold edge, said means including a pair of diverging legs extending downwardly at an angle of divergence equal to or less than 90*, the legs defining a plane parallel to the axis oF direction of movement of the advancing fabric.
Claim 17
Dependent Claim
23 words
An apparatus as defined in claim 12 wherein the means for advancing and supporting a length of fabric is an endless conveyor belt.
Claim 18
Dependent Claim
29 words
An apparatus as defined in claim 12 wherein means are provided below the advancing means forming a guide slot adapted to guide the slitted fabric to the opening frame.
Claim 19
Dependent Claim
42 words
An apparatus as defined in claim 12 wherein the means forming a point for engaging the inner side of the fabric at the unslitted fold edge includes a pair of diverging legs supported by a forward triangular frame which is substantially vertical.
Claim 20
Dependent Claim
70 words
In an apparatus for opening a tubular fabric, means being provided for advancing the fabric after it has been opened into a web, an endless continuous cord wherein the contact run thereof moves in a direction transverse and outward from the advancing fabric, for flattening the edges of the web as it is advancing the means for maintaining the edges in a flattened condition after the edges have been flattened.
Claim 21
Dependent Claim
70 words
In an apparatus for opening a tubular fabric, means being provided for advancing the fabric after it has been opened into a web, an endless continuous cord wherein the contact run thereof moves in a direction transverse and outward from the advancing fabric, for flattening the edges of the web as it is advancing the means for maintaining the edges in a flattened condition after the edges have been flattened.
Claim 22
Dependent Claim
32 words
An apparatus as defined in claim 16 wherein the endless cord is a circular cross section and is run about pulleys subtended in a mounting frame adjacent the edge of the fabric.
Claim 23
Dependent Claim
59 words
An apparatus as defined in claim 17 wherein the frame includes a pair of upstanding parallel plates subtending belt-mounting pulleys wherein one of the pulleys is connected to driving means, and a horizontally extending arm extending from the top of said vertically extending plates wherein the horizontally extending arm includes an end pulley about which the belt is run.
Claim 24
Dependent Claim
50 words
An apparatus as defined in claim 18 wherein the belt frame is pivotally mounted to a support means between a position wherein the belt is in contact with the edge of the fabric and in a position wherein the belt is out of contact with the edge of the fabric.
Claim 25
Dependent Claim
61 words
An apparatus as defined in claim 16 wherein the means for maintaining the edges in a flattened condition after they have been flattened include air nozzles mounted over the web of fabric with the nozzles directed outwardly of the web and air pressure supply means for supplying air under pressure through the nozzles towards the edges of the web of fabric.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |