Bulk degausser with fixed arrays of magnet poles

A bulk degaussing apparatus for erasing magnetic media, comprising:

• a plurality of fixed magnetic poles predisposed across a gap for projecting magnetic flux across said gap, spacing of said poles at intervals across the gap, forming a set of fields at staggered intervals;
• a media passage, such that every point in media passing across the width of said media passage is exposed to the set of fields linearly through which the gap passes;
• and
• an adapter to constrain location of media passing through the gap formed by the plurality of poles to the effective degaussing regions formed between the poles.

A bulk degaussing method for erasing various sizes of magnetic media, comprising:

• projecting magnetic flux across a gap with a plurality of fixed magnetic poles formed by an assembly of magnets and iron elements predisposed across a gap;
• spacing of the poles at roughly equal intervals or sets of similar intervals across the gap;
• forming a set of fields at staggered intervals across the width of media passage, such that every point in media passing linearly through the gap passes through either a field resulting from adjacent poles that changes direction over the course of passage, or different fields from different sets of adjacent poles that differ in direction, or both;
• and
• constraining the location of media passing through the gap formed by the plurality of poles to the effective degaussing regions formed between the poles.