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US3633501A Expired / Lapsed US ⏱️ 0.0 years remaining

Print slug mounting means in type chain assembly

Assignee: DECISION DATA Inc A CORP OF
•
Filing: 1969-09-30
•
Granted: 1972-01-11
•
Expires: 1989-09-30
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Abstract

Abstract A chain printer having a type chain which comprises an endless flexible belt to which a plurality of abutting print slugs are attached. Each print slug contains a printing portion located on the outside of the belt and a pair of driving portions which are cantilevered from the printing portion and project across the belt''s edges. Type characters are located on the printing portions and the driving portions have their cantilevered ends shaped to mesh with peripherally spaced notches in a driving pulley so that they thereby drivingly engage the chain with the pulley. Preferably, the pulley is made up of three parts: top and bottom parts having peripherally spaced notches, and a center part which projects between the slugs'' driving portions and abuts the inside of the belt when the type chain moves around the pulley. In addition, preferably, the outside of the belt is toothed and each slug''s printing portion contains a slot into which one of the teeth tightly projects.

Inventors

  • 👤 James H Edwards

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-05 22:16
CPC Classifications
B; B41; B41J; B41J1/00; B41J1/20

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 158 words
A type chain assembly comprising: a. a driving pulley having notches spaced around its periphery; b. an endless flexible belt adapted to move in a continuous path, at least part of which is around the pulley; c. a plurality of abutting print slugs arranged along the length of the belt, each slug having a printing portion with at least one type character thereon adjacent the outside of the belt, each slug also having a pair of cantilevered portions projecting from its printing portion and across opposite edges of the belt, the cantilevered ends of each pair of cantilevered portions being shaped to mesh with the notches in the pulley to drivingly engage the slugs and pulley; and d. a pair of ears on each of the slugs, each pair of ears projecting from the cantilevered portions of its associated slug and abutting the inside of the belt to clamp the belt between itself and the slug''s printing portion.
Claim 2
Dependent Claim 158 words
A type chain assembly comprising: a. a driving pulley having notches spaced around its periphery; b. an endless flexible belt adapted to move in a continuous path, at least part of which is around the pulley; c. a plurality of abutting print slugs arranged along the length of the belt, each slug having a printing portion with at least one type character thereon adjacent the outside of the belt, each slug also having a pair of cantilevered portions projecting from its printing portion and across opposite edges of the belt, the cantilevered ends of each pair of cantilevered portions being shaped to mesh with the notches in the pulley to drivingly engage the slugs and pulley; and d. a pair of ears on each of the slugs, each pair of ears projecting from the cantilevered portions of its associated slug and abutting the inside of the belt to clamp the belt between itself and the slug''s printing portion.
Claim 3
Dependent Claim 41 words
The type chain assembly as recited in claim 1 further comprising a series of spaced teeth located on the outside of the belt, and wherein the printing portion of each slug contains a slot into which one of the teeth projects.
Claim 4
Dependent Claim 31 words
The type chain assembly as recited in claim 2 wherein each slot is centrally located within its printing portion and each tooth tightly fits into the slot into which it projects.
Claim 5
Dependent Claim 39 words
The type chain assembly as recited in claim 2 wherein each pair of ears abut the inside of the belt at a location along the belt where one of the teeth is located on the outside of the belt.
Claim 6
Dependent Claim 55 words
The type chain assembly as recited in claim 1 wherein the pulley comprises top and bottom parts which contain peripherally spaced notches, and a central part interposed between the top and bottom parts, the central part of the pulley adapted to project between the ears of the slugs when the slugs move past the pulley.

References Cited (Backward Citations)

US2267661A Cited
US2936704A Cited
US3041965A Cited
US3041964A Cited
US3113509A Cited
US3142249A Cited
US3216348A Cited
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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) 1975-01-10 1975-07-12 1976-01-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1979-01-10 1979-07-12 1980-01-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1983-01-10 1983-07-12 1984-01-11 $7700.00 Window Closed / Lapsed

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