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Device for blocking insertion of undersized objects

  • US 6,046,880 A
  • Filed: 04/28/1994
  • Issued: 04/04/2000
  • Est. Priority Date: 04/03/1989
  • Status: Expired due to Fees
First Claim
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1. A device having an internal space, and a wall portion having a loading aperture formed therein communicating with said space, fora) accepting insertion of an object having a correct size inserted through said aperture, said object having respective larger and smaller given cross-section dimensions in respective major and minor directions, orthogonal each other and a direction of insertion, one of said dimensions being a given width and the other of said dimensions being a given height, said loading aperture having an opening width and height respectively exceeding said given width and height by a respective clearance, andb) preventing complete insertion of an object having an incorrect size, said incorrect size being an incorrect cross-section dimension less than the corresponding given cross-section dimension in at least one of said major and minor directions, into said internal space,wherein said device comprises:

  • means for blocking complete insertion into said internal space of a partially-inserted object being inserted through said aperture toward said space,means, for urging said partially-inserted object in respective directions parallel to said major and minor directions, consisting of means for urging in respective first and second directions toward one corner of said aperture;

    said device being free from means for urging said Partially-inserted object in directions opposite said first and second directions,means for detecting the respective cross-section dimension of said partially-inserted object in each of said major and minor directions, andmeans for disabling said means for blocking, to permit complete insertion of said partially-inserted object into said internal space responsive to detecting at least that the cross-section dimension of the partially-inserted object in each of said major and minor directions equals the corresponding given cross-section dimension.

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