Patent FR1300946A successfully refreshed from Google Patents.
Patent US3707215A successfully refreshed from Google Patents.
US3707215A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Web tensioner for high speed printer
Assignee: Honeywell Inc
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Filing: 1970-07-06
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Granted: 1972-12-26
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Expires: 1990-07-06
Abstract
Abstract A high speed printer for use with data processing equipment wherein the printing is produced by feeding a paper web past a ribbon and rotating type roll, and striking the web against the type roll and ribbon with a plurality of hammers to produce the printed line. The web is fed in a path past the type roll by a tractor feed arrangement disposed after the type roll, and tensioning means is provided before the type roll to maintain tension in the web being drawn past the print station. A second tensioning means in the form of a pair of tensioning rolls is provided along the paper path after the tractor arrangement to produce an opposite or counter driving force to that force produced by the type roll action on the web during printing.
Inventors
- 👤 Stanley G Familant
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:56
CPC Classifications
B; B41; B41J; B41J15/00; B41J15/16
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
166 words
A document printer having a mechanism for advancing a web along a path into printing alignment with a printing mechanism having a type roll disposed for rotation adjacent said web for contacting said web during the printing operation, said advancing means having in combination, means disposed along said path after the said printing mechanism for driving said web along said path, and rotatable roller means coNtacting said web along said path after said driving means for applying a continuing dynamic tensile force during rotation thereof to a web portion extending between said printer mechanism and said roller means and in a direction opposite to the direction of the force produced on said web by the rotation of said type roll, said roller means being effective to move said web at the point of roller means contact an increment of length sufficient to compensate for stretching of said web portion and thereby maintain a tensile force of substantially constant value on said web during the printing operation.
Claim 2
Dependent Claim
166 words
A document printer having a mechanism for advancing a web along a path into printing alignment with a printing mechanism having a type roll disposed for rotation adjacent said web for contacting said web during the printing operation, said advancing means having in combination, means disposed along said path after the said printing mechanism for driving said web along said path, and rotatable roller means coNtacting said web along said path after said driving means for applying a continuing dynamic tensile force during rotation thereof to a web portion extending between said printer mechanism and said roller means and in a direction opposite to the direction of the force produced on said web by the rotation of said type roll, said roller means being effective to move said web at the point of roller means contact an increment of length sufficient to compensate for stretching of said web portion and thereby maintain a tensile force of substantially constant value on said web during the printing operation.
Claim 3
Dependent Claim
53 words
The printer as set forth in claim 1 wherein said roller means comprises a drive roll with a surface having a high coefficient of friction contacting said web, and means for rotating said roll in a direction to produce said force on said web to drive said web away from said printing mechanism.
Claim 4
Dependent Claim
53 words
The printer as set forth in claim 2 wherein said roller means further comprises an idler roll with a surface having a coefficient of friction substantially less than that of said drive roll surface, said idler roll being positioned to apply a normal force to said drive roll with said web disposed therebetween.
Claim 5
Dependent Claim
31 words
The printer as set forth in claim 3 which further includes means for adjustably increasing or decreasing the magnitude of normal force applied to said drive roll by said idler roll.
Claim 6
Dependent Claim
34 words
The printer as set forth in claim 4 wherein said drive roll surface is a rubber composition and said force applied to said drive roll by said idler roll is greater than 100 grams.
Claim 7
Dependent Claim
42 words
The printer as set forth in claim 2 wherein said printing mechanism comprises a plurality of print hammers disposed adjacent said type roll and movable to a position to force said web into driving relation with said type roll during rotation thereof.
Claim 8
Dependent Claim
41 words
The printer as set forth in claim 6 wherein said web is provided with perforations at an edge, and said driving means is provided with a plurality of studs engageable with said perforations to so drive said web along said path.
Claim 9
Dependent Claim
39 words
A printer as set forth in claim 1 which further includes other tensioning means disposed along said path before said printing mechanism for applying a static drag force to said web in the opposite direction to said tensile force.
Claim 10
Dependent Claim
116 words
In a document printer wherein a feed mechanism is disposed after said printing mechanism for driving a paper web through said printing mechanism and wherein said printing mechanism comprises a ribbon and rotatable print roll disposed adjacent one side of the web and a plurality of movable hammers disposed on the opposite side of said web for striking said web and forcing it into contact with said ribbon and print roll combination to produce a line of print, the improvement comprising tensioning means disposed after said feed mechanism for continuously applying a dynamic tensile force of substantially constant value during the printing operation to tension a web portion between said printing mechanism and said tensioning means.
Claim 11
Dependent Claim
116 words
In a document printer wherein a feed mechanism is disposed after said printing mechanism for driving a paper web through said printing mechanism and wherein said printing mechanism comprises a ribbon and rotatable print roll disposed adjacent one side of the web and a plurality of movable hammers disposed on the opposite side of said web for striking said web and forcing it into contact with said ribbon and print roll combination to produce a line of print, the improvement comprising tensioning means disposed after said feed mechanism for continuously applying a dynamic tensile force of substantially constant value during the printing operation to tension a web portion between said printing mechanism and said tensioning means.
Claim 12
Dependent Claim
75 words
The structure as set forth in claim 9 wherein said tensioning means comprises a drive roll having an outer surface with a high coefficient of friction for contacting said web and wherein said drive roll rotation is effective to produce a tensile force in said web opposite to a tensile force produced in said web by contact of said rotating print roll and ribbon combination with said web when struck by one of said hammers.
Claim 13
Dependent Claim
49 words
The structure of claim 10 wherein said tensioning means further comprises an idler roll with a surface having a coefficient of friction substantially less than that of said drive roll surface, said idler roll being positioned to apply a force to said drive roll with said web disposed therebetween.
Claim 14
Dependent Claim
27 words
The structure of claim 11 which further includes means for adjustably increasing or decreasing the magnitude of force applied to said drive roll by said idler roll.
Claim 15
Dependent Claim
39 words
A printer as set forth in claim 9 which further includes oTher tensioning means disposed along said path before said printing means for applying a static drag force to said web in the opposite direction to said tensile force.
Claim 16
Independent Claim
145 words
The method of feeding a paper web through a printer of the type wherein a ribbon and rotating type roll are disposed adjacent one side of the web and a plurality of movable hammers are disposed adjacent the opposite side of the web to strike the web and force it into the ribbon and rotating type roll to form a line of print on the web, which includes the steps of advancing the web in increments past the type roll, printing upon said web by means of said plurality of movable hammers and said ribbon and type roll, and continuously applying a substantially constant dynamic force on said web opposite the force produced on said web by contact of said type roll and ribbon combination with said web to maintain line registration of the web with said print roll during printing of an entire line.
Claim 17
Independent Claim
145 words
The method of feeding a paper web through a printer of the type wherein a ribbon and rotating type roll are disposed adjacent one side of the web and a plurality of movable hammers are disposed adjacent the opposite side of the web to strike the web and force it into the ribbon and rotating type roll to form a line of print on the web, which includes the steps of advancing the web in increments past the type roll, printing upon said web by means of said plurality of movable hammers and said ribbon and type roll, and continuously applying a substantially constant dynamic force on said web opposite the force produced on said web by contact of said type roll and ribbon combination with said web to maintain line registration of the web with said print roll during printing of an entire line.
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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) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |