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EP0127144A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Paper tape feed and drive mechanism

Assignee: Northrop Grumman Guidance and Electronics Co Inc
•
Filing: 1984-05-24
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Granted: —
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Expires: 2004-05-24
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Abstract

Abstract @ A paper feed and drive mechanism for use in a high speed printer comprises a pair of arms (22) which may be selectively positioned in a first lowered position, or in a second raised position. When the arms are in the lowered position, a line of contact (17) is formed between a pressure roll (20) and a drive roll (18) and a narrow printing gap is formed between the platen (26) and the inked ribbon. Spring (44) bias the pressure roll (20) onto the drive roll (18) and clips (34) mounted on the arms (22) hold the arms in the lowered position against the bias. Allowing the arms (22) to raise to a second position in response to the spring bias creates a gap between the pressure roll (20) and the drive roll (18) and a wide non-printable gap between the platen (26) and the inked ribbon. Additionally, a narrow tear bar slot (33) formed between a fixed saw tooth tear bar (32) and a backing plate (30) attached to the arms opens to form a wide space when the arms are raised. The wide space eliminates the necessity to thread the paper tape (12, 14) through the narrow tear bar slot (33).

Inventors

  • 👤 Karl Tommy Wincent

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-06 12:03
CPC Classifications
B; B41; B41J; B41J15/00; B41J15/04

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 163 words
A paper feed and drive mechanism for use in a high speed printer in which a matrix printing element is used to print alpha-numeric information through an inked ribbon onto a paper tape comprises in combination a machine frame (31), a drive roll (18) and a pressure roll (20) with a nip (17) therebetween for a paper tape (12, 14) a platen (26) for backing the paper tape in the region of the inked ribbon (46), and a backing plate (30) separated from a tear bar (32) by a narrow slot (33), characterized in that the presure roll (20) and the platen (26) are mounted on a pair of spaced arms (22) attached by pivots (38) to the machine frame, whereby the pressure roll (20) and the platen (26) may be raised from their normal position to open the nip (17) and remove the platen from the inked ribbon (46) to allow-a new paper tape (12, 14) to be inserted into the machanism.
Claim 2
Dependent Claim 163 words
A paper feed and drive mechanism for use in a high speed printer in which a matrix printing element is used to print alpha-numeric information through an inked ribbon onto a paper tape comprises in combination a machine frame (31), a drive roll (18) and a pressure roll (20) with a nip (17) therebetween for a paper tape (12, 14) a platen (26) for backing the paper tape in the region of the inked ribbon (46), and a backing plate (30) separated from a tear bar (32) by a narrow slot (33), characterized in that the presure roll (20) and the platen (26) are mounted on a pair of spaced arms (22) attached by pivots (38) to the machine frame, whereby the pressure roll (20) and the platen (26) may be raised from their normal position to open the nip (17) and remove the platen from the inked ribbon (46) to allow-a new paper tape (12, 14) to be inserted into the machanism.
Claim 3
Dependent Claim 42 words
The mechanism of claim 1 further characterized in that the backing plate (30) is mounted on the spaced arms (22) whereby the narrow slot (33) may be opened to allow a new paper tape (12, 14) to be inserted into the mechanism.
Claim 4
Dependent Claim 43 words
The mechanism of claim 2 further characterized in that a pair of springs (44) bias the arms (22) to a raised position, and a pair of hold down clips (34) hold the arms in a lowered position against the bias of the springs.

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