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US4378149A Expired / Lapsed US ⏱️ 0.0 years remaining

High speed, low-cost character printer

Assignee: Individual
•
Filing: 1980-12-05
•
Granted: 1983-03-29
•
Expires: 2000-12-05
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Abstract

Abstract A light-weight print head having an array of LED light emitting elements positioned adjacent an apertured mask is employed to photographically record at very high speeds characters having high resolution so that they are suitable for phototypesetting. The light transmitting apertures have a cross-sectional area substantially smaller than the cross-sectional area of the LEDs and since the apertures may be very accurately positioned with respect to each other, high character resolutions are obtainable despite misalignment between the mask and the array of LEDs. A flat, lightweight, flexible ribbon of conductors is coupled between the moving scanning head and a stationary source of electrical signals. An electrically insulating, opaque filler may advantageously be employed between the LEDs.

Inventors

  • 👤 Peter R. Ebner

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-27 23:34
CPC Classifications
B; B41; B41B; B41B19/00; G; G06; G06K; G06K15/00; G06K15/02; G06K15/12

Claims Analysis

Total Claims: 21
Claim 1
Independent Claim 200 words
In a printer exposing a receptor sheet to actinic radiation signals for forming indicia thereon: a. a print head having a plurality of actinic radiation emitting sources together with a mask including at least one array of actinic radiation transmitting apertures substantially smaller than said actinic radiation emitting sources, each aperture being aligned with an associated actinic radiation emitting source; b. means for moving said print head across said receptor sheet in a first direction; c. a source of electrical signals for selectively controlling the activation of said actinic radiation sources; d. electrical transmission means coupled between said source of electrical signals and said plurality of actinic radiation sources for causing said actinic radiation sources to be selectively activated during the motion of said print head across said receptor sheet in said first direction; e. means for moving said receptor sheet in a second direction transverse to said first direction of motion of said print head after the recordation of a line of indicia recorded upon said receptor sheet; and, f. means for maintaining said receptor sheet in close proximity with said print head during the scanning motion of said print head in said first direction across said receptor sheet.
Claim 2
Dependent Claim 200 words
In a printer exposing a receptor sheet to actinic radiation signals for forming indicia thereon: a. a print head having a plurality of actinic radiation emitting sources together with a mask including at least one array of actinic radiation transmitting apertures substantially smaller than said actinic radiation emitting sources, each aperture being aligned with an associated actinic radiation emitting source; b. means for moving said print head across said receptor sheet in a first direction; c. a source of electrical signals for selectively controlling the activation of said actinic radiation sources; d. electrical transmission means coupled between said source of electrical signals and said plurality of actinic radiation sources for causing said actinic radiation sources to be selectively activated during the motion of said print head across said receptor sheet in said first direction; e. means for moving said receptor sheet in a second direction transverse to said first direction of motion of said print head after the recordation of a line of indicia recorded upon said receptor sheet; and, f. means for maintaining said receptor sheet in close proximity with said print head during the scanning motion of said print head in said first direction across said receptor sheet.
Claim 3
Dependent Claim 24 words
The combination as set forth in claim 1 wherein said actinic radiation transmitting apertures comprise a photographic image formed upon a light weight substrate.
Claim 4
Dependent Claim 24 words
The combination as set forth in claims 1 or 2 wherein said electrical transmission means comprises a light weight, flexible ribbon of electrical conductors.
Claim 5
Dependent Claim 16 words
The combination as set forth in claims 1 or 2 wherein said mask is electrically conductive.
Claim 6
Dependent Claim 22 words
The combination as set forth in claim 4 wherein said electrical transmission means comprises a flexible, light weight ribbon of electrical conductors.
Claim 7
Dependent Claim 202 words
In a printer exposing a receptor sheet to actinic radiation for forming indicia thereon: a. a print head consisting essentially of a plurality of actinic radiation sources together with a mask including at least one array of actinic radiation transmitting apertures substantially smaller than said actinic radiation emitting sources, each aperture being aligned with an associated actinic radiation emitting source; b. means for moving said print head across said receptor sheet in a first direction; c. a source of electrical signals for selectively controlling the activation of said actinic radiation emitting sources; d. electrical transmission means coupled between said source of electrical signals and said plurality of actinic radiation emitting sources for causing said actinic radiation sources to be selectively activated during the motion of said print head across said receptor sheet in said first direction; e. means for moving said receptor sheet in a second direction transverse to said first direction of motion of said print head after the recordation of a line of indicia recorded upon said receptor sheet; and, f. means for maintaining said receptor sheet in close proximity with said print head during the scanning motion of said print head in said first direction across said receptor sheet.
Claim 8
Dependent Claim 202 words
In a printer exposing a receptor sheet to actinic radiation for forming indicia thereon: a. a print head consisting essentially of a plurality of actinic radiation sources together with a mask including at least one array of actinic radiation transmitting apertures substantially smaller than said actinic radiation emitting sources, each aperture being aligned with an associated actinic radiation emitting source; b. means for moving said print head across said receptor sheet in a first direction; c. a source of electrical signals for selectively controlling the activation of said actinic radiation emitting sources; d. electrical transmission means coupled between said source of electrical signals and said plurality of actinic radiation emitting sources for causing said actinic radiation sources to be selectively activated during the motion of said print head across said receptor sheet in said first direction; e. means for moving said receptor sheet in a second direction transverse to said first direction of motion of said print head after the recordation of a line of indicia recorded upon said receptor sheet; and, f. means for maintaining said receptor sheet in close proximity with said print head during the scanning motion of said print head in said first direction across said receptor sheet.
Claim 9
Dependent Claim 24 words
The combination as set forth in claim 6 wherein said actinic radiation transmitting apertures comprise a photographic image formed upon a light weight substrate.
Claim 10
Dependent Claim 25 words
The combination as set forth in claims 6 or 7 wherein said electrical transmission means comprises a flat light weight flexible ribbon of electrical conductors.
Claim 11
Dependent Claim 14 words
The combination as set forth in claim 7 wherein said mask is electrically conductive.
Claim 12
Dependent Claim 23 words
The combination as set forth in claim 9 wherein said electrical transmission means comprises a flat, flexible light weight ribbon of electrical conductors.
Claim 13
Dependent Claim 205 words
In a printer exposing a receptor sheet to actinic radiation signals for forming indicia thereon: a. a print head having a plurality of actinic radiation emitting sources together with a mask positioned adjacent said sources including at least one array of actinic radiation transmitting apertures substantially smaller than said actinic radiation sources, each aperture being aligned with an associated actinic radiation emitting sources; b. means for moving said print head across said receptor sheet in a first direction; c. a source of electrical signals for selectively controlling the activation of said actinic radiation emitting sources; d. electrical transmission means coupled between said source of electrical signals and said plurality of actinic radiation emitting sources for causing said actinic radiation sources to be selectively activated during the motion of said print head across said receptor sheet in said first direction; e. means for moving said receptor sheet in a second direction transverse to said first direction of motion of said print head after the recordation of a line of indicia recorded upon said receptor sheet; and, f. means for maintaining said receptor sheet in close proximity with said flat mask during the scanning motion of said print head in said first direction across said receptor sheet.
Claim 14
Dependent Claim 205 words
In a printer exposing a receptor sheet to actinic radiation signals for forming indicia thereon: a. a print head having a plurality of actinic radiation emitting sources together with a mask positioned adjacent said sources including at least one array of actinic radiation transmitting apertures substantially smaller than said actinic radiation sources, each aperture being aligned with an associated actinic radiation emitting sources; b. means for moving said print head across said receptor sheet in a first direction; c. a source of electrical signals for selectively controlling the activation of said actinic radiation emitting sources; d. electrical transmission means coupled between said source of electrical signals and said plurality of actinic radiation emitting sources for causing said actinic radiation sources to be selectively activated during the motion of said print head across said receptor sheet in said first direction; e. means for moving said receptor sheet in a second direction transverse to said first direction of motion of said print head after the recordation of a line of indicia recorded upon said receptor sheet; and, f. means for maintaining said receptor sheet in close proximity with said flat mask during the scanning motion of said print head in said first direction across said receptor sheet.
Claim 15
Dependent Claim 24 words
The combination as set forth in claim 11 wherein said actinic radiation transmitting apertures comprise a photographic image formed upon a light weight substrate.
Claim 16
Dependent Claim 25 words
The combination as set forth in claims 11 or 12 wherein said electrical transmission means comprises a flat, light weight, flexible ribbon of electrical conductors.
Claim 17
Dependent Claim 14 words
The combination as set forth in claim 12 wherein said mask is electrically conductive.
Claim 18
Dependent Claim 23 words
The combination as set forth in claim 14 wherein said electrical transmission means comprises a flat, flexible, light weight ribbon of electrical conductors.
Claim 19
Dependent Claim 30 words
The combination as set forth in claims 1, 2, 11, or 12 further including an electrically insulating filler positioned between said radiation sources, said filler also having low light transmissivity.
Claim 20
Dependent Claim 246 words
In a printer exposing a receptor sheet to actinic radiation signals for forming indicia thereon: a. a print head having a plurality of actinic radiation emitting sources together with a mask including at least one array of actinic radiation transmitting apertures substantially smaller than said actinic radiation emitting sources, each aperture being aligned with an associated actinic radiation emitting source, said print head further including a set of column conductors coupled to first portions of said sources, a set of row conductors coupled to second portions of said sources and an electrically insulating filler positioned between said radiation sources, said filler also having low light transmissivity; b. means for moving said print head across said receptor sheet in a first direction; c. a source of electrical signals for selectively controlling the activation of said actinic radiation sources; d. electrical transmission means coupled between said source of electrical signals and said plurality of actinic radiation sources for causing said actinic radiation sources to be selectively activated during the motion of said print head across said receptor sheet in said first direction; e. means for moving said receptor sheet in a second direction transverse to said first direction of motion of said print head after the recordation of a line of indicia recorded upon said receptor sheet; and, f. means for maintaining said receptor sheet in close proximity with said print head during the scanning motion of said print head in said first direction across said receptor sheet.
Claim 21
Dependent Claim 246 words
In a printer exposing a receptor sheet to actinic radiation signals for forming indicia thereon: a. a print head having a plurality of actinic radiation emitting sources together with a mask including at least one array of actinic radiation transmitting apertures substantially smaller than said actinic radiation emitting sources, each aperture being aligned with an associated actinic radiation emitting source, said print head further including a set of column conductors coupled to first portions of said sources, a set of row conductors coupled to second portions of said sources and an electrically insulating filler positioned between said radiation sources, said filler also having low light transmissivity; b. means for moving said print head across said receptor sheet in a first direction; c. a source of electrical signals for selectively controlling the activation of said actinic radiation sources; d. electrical transmission means coupled between said source of electrical signals and said plurality of actinic radiation sources for causing said actinic radiation sources to be selectively activated during the motion of said print head across said receptor sheet in said first direction; e. means for moving said receptor sheet in a second direction transverse to said first direction of motion of said print head after the recordation of a line of indicia recorded upon said receptor sheet; and, f. means for maintaining said receptor sheet in close proximity with said print head during the scanning motion of said print head in said first direction across said receptor sheet.

References Cited (Backward Citations)

US3555555A Cited
US3952311A Cited
US3952311B1 Cited
US3832488A Cited
US3836917A Cited
US3973130A Cited
US4096486A Cited
US4168894A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1986-03-28 1986-09-27 1987-03-29 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1990-03-28 1990-09-27 1991-03-29 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1994-03-28 1994-09-27 1995-03-29 $7700.00 Window Closed / Lapsed

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