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Shuffling inventory holders

  • US 9,248,973 B1
  • Filed: 07/15/2015
  • Issued: 02/02/2016
  • Est. Priority Date: 03/31/2014
  • Status: Active Grant
First Claim
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1. A method comprising:

  • positioning multiple inventory holders at corresponding multiple locations of a pick station of an inventory system, the multiple locations including multiple pick locations and multiple staging locations;

    shuffling the multiple inventory holders among the multiple pick locations and the multiple staging locations of the pick station using multiple mobile drive units, the shuffling comprising;

    repositioning, using a first mobile drive unit, a first inventory holder from a first pick location of the multiple pick locations to a first staging location of the multiple staging locations;

    repositioning, using a second mobile drive unit, a second inventory holder from a second staging location of the multiple staging locations to the first pick location;

    repositioning, using a third mobile drive unit, a third inventory holder from a second pick location of the multiple pick locations to the second staging location;

    repositioning, using a fourth mobile drive unit, a fourth inventory holder from a third staging location of the multiple staging locations to the second pick location;

    removing the first inventory holder and the third inventory holder from the pick station; and

    retrieving a fifth inventory holder and depositing the fifth inventory holder in one of the first or second staging locations.

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