US PATENT SUBCLASS 400 / 634
.~ Including friction-feed means (e.g., band)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


400 /   HD   TYPEWRITING MACHINES

578  DF  SHEET OR WEB (E.G., RECORD-MEDIUM FEEDING MECHANISM) {13}
634.~ Including friction-feed means (e.g., band) {2}
635  DF  .~.~> By endless-feed band
636  DF  .~.~> By roller couple (e.g., rotatable pinch rollers, etc.) {8}

DEFINITION

Classification: 400/634

Including friction-feed means (e.g., band):

(under subclass 578) Subject matter wherein significance is attributed to movement of a record-medium* in a line-space* direction, which movement is caused by one or more members having a surface or surfaces that closely contact the surface(s) of the record-medium adjacent thereto and move relative to the typewriter in a direction parallel to the line-space direction while the surface(s) of the member(s) do not slide relative to the surface(s) of the record-medium, thereby moving the record-medium in said direction.

(1) Note. In this subclass a flexible feed band cooperates with a platen* to feed a sheet of record-medium lying between the band and the platen.

(2) Note. In amplification of the phrase "in a direction parallel to the line-space direction", the following should be noted. Two members having surfaces that face one another with the record-medium therebetween may comprise a roller

couple, wherein each of the feed-roller* elements rotate about a fixed axis in opposite rotational directions, but the two peripheral portions of the roller surfaces that are closest to each other are tangent to substantially the same line and the rotation is such as to move the tangent roller surfaces in the line-space direction. Similar members may move along a line perpendicular to their axes without rotation of the rollers, thus moving the record-medium that is therebetween, and return along the same line but in opposite direction, but during the return movement the rollers rotate so as not to return the record-medium; or, two nonrotatable members may close onto the record-medium and move in the line-space direction, but open out of contact with the record-medium for return of the members.

SEE OR SEARCH THIS CLASS, SUBCLASS:

617+, for friction feed of a web by a reciprocating-gripper couple or a reciprocating-pinch-roller couple.