Paper Stack Lifter
Original Publication Date: 1986-Dec-01
Included in the Prior Art Database: 2005-Mar-09
Bottom restacking of documents in a copier's automatic document feeder is facilitated by a mechanical lifting finger which is moved in a controlled manner by operation of a microprocessor-controlled (i.e., programmable) stepper motor. The document feeder may be of the type disclosed in U. S. Patent 4,456,235. (Image Omitted) Fig. 1 shows a side view of the entry end of the document feeder's generally horizontal table 10. This table is provided to hold a stack of original documents 11 which are to be copied by operation of a copier (not shown). After a document sheet has been copied, it is returned to the bottom of the stack by way of path 12 (Fig. 4). Another document sheet is then fed to the copier, from the top of the stack, by operation of a vacuum sheet feeder (not shown).