Patent US4311994A successfully refreshed from Google Patents.
US4091979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Methods and apparatus for precision guiding a web
Assignee: Bell and Howell Co
•
Filing: 1976-03-29
•
Granted: 1978-05-30
•
Expires: 1996-03-29
Abstract
Abstract A moving web is precision guided by twisting the moving web about an axis extending in a direction of movement of the web to provide a yaw force acting continuously in a predetermined direction transversely of the web, and resisting that yaw force at a predetermined location.
Inventors
- 👤 Lewis B. Browder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:20
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/02; B; B65; B65H; B65H23/00; B65H23/02; G11B15/18; G11B15/26; G11B15/28; G11B15/295; G11B15/43; G11B15/60; G11B15/605
Claims Analysis
Total Claims: 47
Claim 1
Independent Claim
97 words
A method of precision guiding a web, comprising in combination the steps of: moving said web; providing a guide for said moving web having a web guiding surface; pivoting said guide for movement about a pivot axis extending through said web guiding surface and being laterally spaced from a longitudinal axis of symmetry of said web for twisting said moving web about an axis extending in a direction of movement of said web to provide a yaw force acting continuously in a predetermined direction transversely of said web; and resisting said yaw force at a predetermined location.
Claim 2
Independent Claim
97 words
A method of precision guiding a web, comprising in combination the steps of: moving said web; providing a guide for said moving web having a web guiding surface; pivoting said guide for movement about a pivot axis extending through said web guiding surface and being laterally spaced from a longitudinal axis of symmetry of said web for twisting said moving web about an axis extending in a direction of movement of said web to provide a yaw force acting continuously in a predetermined direction transversely of said web; and resisting said yaw force at a predetermined location.
Claim 3
Dependent Claim
31 words
A method as claimed in claim 1, wherein: said moving web is twisted by developing a torsional force couple about said axis, and applying said torsional force couple to said web.
Claim 4
Dependent Claim
36 words
A method as claimed in claim 1, wherein: said moving web is moved in said predetermined direction with said yaw force; and movement of said web in said predetermined direction is stopped at said predetermined location.
Claim 5
Dependent Claim
51 words
A method as claimed in claim 1, including the steps of: swiveling said guide about said pivot axis in a first mode of operation during movement of said web; selectively arresting said swiveling of said guide in a second mode of operation; and moving the web while said swiveling is arrested.
Claim 6
Dependent Claim
21 words
A method as claimed in claim 1, wherein: said twisting of the moving web is limited to one sense of rotation.
Claim 7
Dependent Claim
43 words
A method as claimed in claim 1, including the steps of: providing a cylindrical guide for said web as said guide; and pivoting said cylindrical guide for movement about said axis being laterally spaced from a longitudinal axis of symmetry of said web.
Claim 8
Dependent Claim
20 words
A method as claimed in claim 6, including the step of: rotating said cylindrical guide about an axis of rotation.
Claim 9
Dependent Claim
46 words
A method as claimed in claim 1, including the steps of: providing a cylindrical guide for said web as said guide; rotating said cylindrical guide about an axis of rotation; pivoting said cylindrical guide about an axis extending at an angle to said axis of rotation.
Claim 10
Independent Claim
92 words
A method of precision guiding a magnetic recording web past recording head stacks, comprising in combination the steps of: moving said web; establishing a pressure gradient transversely of said web; twisting said moving web with said pressure gradient at a first location about an axis extending in a direction of movement of said web to provide a yaw force acting continuously in a predetermined direction transversely of said web; and resisting said yaw force at a predetermined second location located between and spaced from said first location and said recording head stacks.
Claim 11
Independent Claim
92 words
A method of precision guiding a magnetic recording web past recording head stacks, comprising in combination the steps of: moving said web; establishing a pressure gradient transversely of said web; twisting said moving web with said pressure gradient at a first location about an axis extending in a direction of movement of said web to provide a yaw force acting continuously in a predetermined direction transversely of said web; and resisting said yaw force at a predetermined second location located between and spaced from said first location and said recording head stacks.
Claim 12
Dependent Claim
50 words
A method as claimed in claim 9, including the steps of: providing a fluid flow channel delimited by said moving web and having an effective cross-section decreasing in a predetermined direction to establish said pressure gradient; and flowing a fluid through said channel to effect said twisting of the web.
Claim 13
Dependent Claim
35 words
A method as claimed in claim 10, wherein: said fluid flow channel is also delimited by a porous material spaced from said web; and said fluid is passed through said porous material to said channel.
Claim 14
Dependent Claim
17 words
A method as claimed in claim 11, wherein: said porous material is provided with a wedgeshaped configuration.
Claim 15
Dependent Claim
14 words
A method as claimed in claim 11, wherein: said porous material is frustoconically shaped.
Claim 16
Dependent Claim
129 words
In apparatus for precision guiding a web, the improvement comprising in combination: means for moving said web; guide means for said moving web having a web guiding surface; means operatively associated with said moving means for twisting said moving web about an axis extending in a direction of movement of said web to provide a yaw force in a predetermined direction transversely of said web, including means pivoting said guide means for movement about a pivot axis extending through said web guiding surface and being laterally spaced from a longitudinal axis of symmetry of said web and for swiveling said guide means about said pivot axis in a first mode of operation; and means operatively associated with said moving means for resisting said yaw force at a predetermined location.
Claim 17
Dependent Claim
129 words
In apparatus for precision guiding a web, the improvement comprising in combination: means for moving said web; guide means for said moving web having a web guiding surface; means operatively associated with said moving means for twisting said moving web about an axis extending in a direction of movement of said web to provide a yaw force in a predetermined direction transversely of said web, including means pivoting said guide means for movement about a pivot axis extending through said web guiding surface and being laterally spaced from a longitudinal axis of symmetry of said web and for swiveling said guide means about said pivot axis in a first mode of operation; and means operatively associated with said moving means for resisting said yaw force at a predetermined location.
Claim 18
Dependent Claim
47 words
An apparatus as claimed in claim 14, including: means operatively associated with said twisting means for selectively arresting said swiveling of said guide means in a second mode of operation; and means operatively associated with said moving means for moving said web while said swiveling is arrested.
Claim 19
Dependent Claim
31 words
An apparatus as claimed in claim 14, wherein: said guide means include a cylindrical guide member and means for mounting said cylindrical guide member for rotation about an axis of rotation.
Claim 20
Dependent Claim
57 words
An apparatus as claimed in claim 14, wherein: said guide means include a cylindrical guide member for said web, and means for mounting said cylindrical guide member for rotation about an axis of rotation, said pivoting means including means for pivoting said cylindrical guide member about an axis extending at an angle to said axis of rotation.
Claim 21
Dependent Claim
129 words
In apparatus for precision guiding a web, the improvement comprising in combination: means for moving said web; means operatively associated with said moving means for twisting said moving web about an axis extending in a direction of movement of said web to provide a yaw force in a predetermined direction transversely of said web; and means operatively associated with said moving means for resisting said yaw force at a predetermined location; said twisting means include a cylindrical guide member for said web, means for mounting said cylindrical guide member of rotation about an axis of rotation, and means for pivoting said cylindrical guide member about an axis extending at an angle to said axis of rotation and being laterally spaced from a longitudinal axis of symmetry of said web.
Claim 22
Dependent Claim
129 words
In apparatus for precision guiding a web, the improvement comprising in combination: means for moving said web; means operatively associated with said moving means for twisting said moving web about an axis extending in a direction of movement of said web to provide a yaw force in a predetermined direction transversely of said web; and means operatively associated with said moving means for resisting said yaw force at a predetermined location; said twisting means include a cylindrical guide member for said web, means for mounting said cylindrical guide member of rotation about an axis of rotation, and means for pivoting said cylindrical guide member about an axis extending at an angle to said axis of rotation and being laterally spaced from a longitudinal axis of symmetry of said web.
Claim 23
Dependent Claim
124 words
In apparatus for advancing a magnetic recording web past recording head stacks, the improvement comprising in combination: a web edge guide; means for moving said web relative to said web edge guide and said head stacks; means operatively associated with said web edge guide for urging said moving web against said web edge guide, including a round member having a taper in a direction away from said web edge guide and means for establishing on a surface of said round member a pressure gradient for supporting said moving web relative to said round member; means for mounting said round member at a distance from said web edge guide; and means for locating said web edge guide between said round member and said head stacks.
Claim 24
Dependent Claim
124 words
In apparatus for advancing a magnetic recording web past recording head stacks, the improvement comprising in combination: a web edge guide; means for moving said web relative to said web edge guide and said head stacks; means operatively associated with said web edge guide for urging said moving web against said web edge guide, including a round member having a taper in a direction away from said web edge guide and means for establishing on a surface of said round member a pressure gradient for supporting said moving web relative to said round member; means for mounting said round member at a distance from said web edge guide; and means for locating said web edge guide between said round member and said head stacks.
Claim 25
Dependent Claim
36 words
An apparatus as claimed in claim 19, wherein: said urging means include means for establishing a pressure gradient transversely of said web and said taper for effecting the twisting of the web with said pressure gradient.
Claim 26
Dependent Claim
51 words
An apparatus as claimed in claim 19, wherein: said urging means include means for providing a fluid flow channel delimited by said moving web and said taper and having an effective cross-section increasing in said direction, and means connected to said channel providing means for flowing a fluid through said channel.
Claim 27
Dependent Claim
29 words
An apparatus as claimed in claim 21, wherein: said round member is porous, and said fluid flowing means include means for passing a fluid through said porous round member.
Claim 28
Dependent Claim
16 words
An apparatus as claimed in claim 22, wherein: said porous round member has a wedge-shaped configuration.
Claim 29
Dependent Claim
16 words
An apparatus as claimed in claim 22, wherein: said porous round member has a frustoconical configuration.
Claim 30
Dependent Claim
140 words
In apparatus for precision guiding a magnetic recording web past recording head stacks, the improvement comprising in combination: a web edge guide; means for moving said web relative to said web edge guide and said head stacks; means operatively associated with said web edge guide for urging said moving web against said web edge guide, including a porous round member having a taper in a direction away from said web edge guide and means connected to said round member for flowing a fluid through said porous round member for establishing on a surface of said round member a pressure gradient for supporting said moving web relative to said round member; means for mounting said round member at a distance from said web edge guide; and means for locating said web edge guide between said round member and said head stacks.
Claim 31
Dependent Claim
140 words
In apparatus for precision guiding a magnetic recording web past recording head stacks, the improvement comprising in combination: a web edge guide; means for moving said web relative to said web edge guide and said head stacks; means operatively associated with said web edge guide for urging said moving web against said web edge guide, including a porous round member having a taper in a direction away from said web edge guide and means connected to said round member for flowing a fluid through said porous round member for establishing on a surface of said round member a pressure gradient for supporting said moving web relative to said round member; means for mounting said round member at a distance from said web edge guide; and means for locating said web edge guide between said round member and said head stacks.
Claim 32
Dependent Claim
67 words
In apparatus for advancing a web, the improvement comprising in combination: a hollow-cylindrical web guide roller; a cage inside said hollow-cylindrical web guide roller; means between said cage and said roller for mounting said roller for rotation about said cage; and means connected to said cage for pivoting said cage for movement about an axis extending at an angle to an axis of rotation of said roller.
Claim 33
Dependent Claim
67 words
In apparatus for advancing a web, the improvement comprising in combination: a hollow-cylindrical web guide roller; a cage inside said hollow-cylindrical web guide roller; means between said cage and said roller for mounting said roller for rotation about said cage; and means connected to said cage for pivoting said cage for movement about an axis extending at an angle to an axis of rotation of said roller.
Claim 34
Dependent Claim
34 words
An apparatus as claimed in claim 26, wherein: said pivoting means include means for pivoting said cage for movement about an axis being laterally spaced from a longitudinal axis of symmetry of said web.
Claim 35
Dependent Claim
71 words
An apparatus as claimed in claim 26, wherein: said cage pivoting means include an elongate support member extending through said cage along an axis of rotation of said web guide roller, and means laterally projecting from said elongate support member for pivoting said cage for movement about an axis being laterally spaced from a longitudinal axis of symmetry of said web and extending at an angle to said axis of rotation.
Claim 36
Dependent Claim
23 words
An apparatus as claimed in claim 26, including: a web edge guide spaced from said roller for limiting lateral movement of said web.
Claim 37
Dependent Claim
50 words
An apparatus as claimed in claim 26, wherein: said web guide roller has a web guiding surface; and said pivoting means include means for pivoting said cage for movement about an axis extending through said web guiding surface and laterally spaced from a longitudinal axis of symmetry of said web.
Claim 38
Dependent Claim
78 words
In apparatus for advancing a web, the improvement comprising in combination: cylindrical web guide means having an axis of rotation and a web guiding surface; and means coupled to said web guide means for pivoting said web guide means about an axis extending at an angle to said axis of rotation and extending through said web guiding surface, said pivoting means including means for spacing said pivot axis laterally from a longitudinal axis of symmetry of said web.
Claim 39
Dependent Claim
78 words
In apparatus for advancing a web, the improvement comprising in combination: cylindrical web guide means having an axis of rotation and a web guiding surface; and means coupled to said web guide means for pivoting said web guide means about an axis extending at an angle to said axis of rotation and extending through said web guiding surface, said pivoting means including means for spacing said pivot axis laterally from a longitudinal axis of symmetry of said web.
Claim 40
Dependent Claim
16 words
An apparatus as claimed in claim 31, including: means for rotatably mounting said web guide means.
Claim 41
Dependent Claim
26 words
An apparatus as claimed in claim 31, wherein: said web guide means are hollow-cylindrical; and said pivoting means are located in said hollow-cylindrical web guiding means.
Claim 42
Dependent Claim
20 words
An apparatus as claimed in claim 31, including: releasable means for selectively arresting said pivoting of the web guide means.
Claim 43
Independent Claim
95 words
A method of precision guiding a web, comprising in combination the steps of: providing a guide for said web having a web guiding surface; swiveling in a first mode of operation said guide about an axis extending through said web guiding surface and being laterally spaced from a longitudinal axis of symmetry of said web; moving said web over said swiveling guide in said first mode of operation; selectively arresting any swiveling of said guide in a second mode of operation; and moving said web over said arrested guide in said second mode of operation.
Claim 44
Independent Claim
95 words
A method of precision guiding a web, comprising in combination the steps of: providing a guide for said web having a web guiding surface; swiveling in a first mode of operation said guide about an axis extending through said web guiding surface and being laterally spaced from a longitudinal axis of symmetry of said web; moving said web over said swiveling guide in said first mode of operation; selectively arresting any swiveling of said guide in a second mode of operation; and moving said web over said arrested guide in said second mode of operation.
Claim 45
Independent Claim
131 words
An apparatus of precision guiding a web, comprising in combination: guide means for said web having a web guiding surface; means coupled to said guide means for swiveling in a first mode of operation said guide means about an axis extending through said web guiding surface and being laterally spaced from a longitudinal axis of symmetry of said web; means operatively associated with said guide means for moving said web over said swiveling guide means in said first mode of operation; means coupled to said guide means for selectively arresting any swiveling of said guide means in a second mode of operation of said apparatus; and means operatively associated with said guide means for moving said web over said arrested guide means in said second mode of operation of said apparatus.
Claim 46
Independent Claim
131 words
An apparatus of precision guiding a web, comprising in combination: guide means for said web having a web guiding surface; means coupled to said guide means for swiveling in a first mode of operation said guide means about an axis extending through said web guiding surface and being laterally spaced from a longitudinal axis of symmetry of said web; means operatively associated with said guide means for moving said web over said swiveling guide means in said first mode of operation; means coupled to said guide means for selectively arresting any swiveling of said guide means in a second mode of operation of said apparatus; and means operatively associated with said guide means for moving said web over said arrested guide means in said second mode of operation of said apparatus.
Claim 47
Dependent Claim
88 words
An apparatus as claimed in claim 36, wherein: said guide means include a cage and a hollow-cylindrical roller rotatably mounted on said cage and having said web guiding surface; said swiveling means include means for swiveling in said first mode of operation said cage about an axis extending through said web guiding surface and being laterally spaced from said longitudinal axis of symmetry of said web; and said arresting means include means for arresting any swiveling of said cage in said second mode of operation of said apparatus.
References Cited (Backward Citations)
FR942875A
Cited
US2862715A
Cited
US3032246A
Cited
US3140033A
Cited
US3143270A
Cited
US3243089A
Cited
US3268222A
Cited
US3608796A
Cited
US3658227A
Cited
US3726588A
Cited
US3799422A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-29 | 1981-11-28 | 1982-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-29 | 1985-11-28 | 1986-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-29 | 1989-11-28 | 1990-05-30 | $7700.00 | Window Closed / Lapsed |