Abstract: An improved lid mechanism for a web feed devices such as tractors for feeding perforated paper webs in printers, copiers and the like, wherein pins on which the lid is pivotally mounted for movement between open and closed position are unloaded (do not have any force or bias applied thereto) when the lid is in its open and closed position. The lid, when closed, covers the paper and is then spaced by a gap from the surface of a frame along which the paper is fed by a pin drive such as a belt having pins which extend into perforations of the paper. A depending leg of the lid has a block with surfaces disposed at an angled to each other. These surfaces extend from a corner of the block. One of these surfaces is preferably perpendicular to the surface of the lid which defines the gap. The other of these surfaces defines the position of the lid in its open position.

Abstract: A document feed tractor has a multiposition lid which is held by projections from the frame of the tractor in open position to enable loading of the perforated document (paper) in the tractor. The lid is pivotally mounted in openings in the projections which enable lid to be both rotated and translated from the open position over the projections, which then define ledges holding up the lid, to closed position when the lid is moved over the edges of the ledges. Then, the lid can snap down under a spring bias to the closed position where it confines the document on the tractor belt.