Offset device for an on-edge stacking apparatus

A stacking apparatus for stacking a plurality of flat articles on edge, each article having a front perimeter edge and two faces, said stacking apparatus adapted to receive each of said plurality of flat articles as each article enters said stacking apparatus moving in a direction generally parallel to said faces of each article, said stacking apparatus comprising:

• (a) a discharge magazine for sequentially receiving and stacking said flat articles face-to-face in an on-edge stack, comprising:
• i) an article inlet,
• ii) an article edge receiver, said article edge receiver including a non-offset position and an offset position, wherein each front perimeter edge contacts said article edge receiver to align said front perimeter edge of each article as said articles enter said stack,
• iii) an article face receiver wherein a face of one of said flat articles abuts said article face receiver;
• and
• (b) said article edge receiver having a register wall, wherein when said article edge receiver is in said non-offset position, each front perimeter edge contacts said register wall to align said front perimeter edge of each article;
• (c) said article edge receiver having a segmented rotational offset disk to provide said offset position, said segmented rotational offset disk having a rotational axis and at least one cut out segment, said cut out segment having a planar stop edge surface parallel to said rotational axis, said cut out segment rotatable from an article receiving position to an article bypass position, wherein when said cut out segment is in the article receiving position said planar stop edge surface is at substantially a right angle to said two faces of said article and said planar stop edge surface is adapted to receive the front perimeter edge of each article, and wherein when said cut out segment is in the article bypass position, said article edge receiver is in said non-offset position such that said segmented rotational offset disk allows said front perimeter edge of each article to bypass the segmented rotational disk and contact said register wall.