US PATENT SUBCLASS 400 / 578
SHEET OR WEB (E.G., RECORD-MEDIUM FEEDING MECHANISM)

Current as of: June, 1999
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400 /   HD   TYPEWRITING MACHINES

578SHEET OR WEB (E.G., RECORD-MEDIUM FEEDING MECHANISM) {13}
579  DF  .~> Including skew correction responsive to position of sheet or web
580  DF  .~> Including forming indicia on record-medium during typing to find next line to be typed {1}
582  DF  .~> Including programmed-control-system for record-medium feed (e.g., on auxiliary record) {1}
584  DF  .~> Including feed of plural record-media arranged side-by-side (e.g., fed independently of platen) {1}
586  DF  .~> Including feed of tally strip record-medium (e.g., plural tally strips) {8}
595  DF  .~> Including insertion of sheet from front of platen (e.g., for "condensed billing", via sheet guide, etc.) {9}
605  DF  .~> For feeding plural record media concurrently or selectively {4}
611  DF  .~> For feeding web record-medium {8}
622  DF  .~> With holder for single sheet (e.g., clip, backing sheet, etc.) {1}
624  DF  .~> For feeding sheet from stack or pack holder {5}
630  DF  .~> Including aligning of sheet edge prior to typing {3}
634  DF  .~> Including friction-feed means (e.g., band) {2}
642  DF  .~> Including sheet guide (e.g., for sheet insertion, etc.) {5}

DEFINITION

Classification: 400/578

SHEET OR WEB (E.G., RECORD-MEDIUM) FEEDING MECHANISM:

(under the class definition) Subject matter wherein significance is attributed to movement of a record-medium* relative to a typewriter, which relative movement is necessary for typing a print-line* and occurs in a direction generally coinciding with the direction in which line-space* movement occurs, or wherein significance is attributed to

structure which facilitates, or contributes to, or enables said record- medium movement.

(1) Note. For a discussion of the difference between line-space movement and record-medium movement, see the definition of line-space in the Glossary, section III, and for a discussion of the difference between a sheet and a web, see the definition of record-medium, also in the Glossary.

(2) Note. This and indented subclasses relate to the feeding of a sheet or web from a supply to the typewriter, or to the movement within the typewriter for line-space or similar purposes, or to the delivery of a sheet or web from the typewriter to a receiver of the sheet or web. To be properly placed as an original patent into this or the indented subclasses, the claimed disclosure of such patent should describe the typewriter by more than its name.

(3) Note. Typewriters of this subclass include such structures as: a stationary sheet table or apron*, a conformation that prevents a sheet having an irregularity or hole thereon from being torn at the hole as the sheet moves through the typewriter, or a typewriter with plural stationary tables or an auxiliary support.

SEE OR SEARCH CLASS

226, Advancing Material of Indeterminate Length, appropriate subclasses for feeding of web material.

271, Sheet Feeding or Delivering, appropriate subclasses for feeding or delivering of sheet material.