Browse Prior Art Database

Storage Receptacle Slot with Biased Retainer Spring

IP.com Disclosure Number: IPCOM000117000D
Original Publication Date: 1995-Dec-01
Included in the Prior Art Database: 2005-Mar-31
Document File: 4 page(s) / 62K

Publishing Venue

IBM

Related People

Dang, CH: AUTHOR [+4]

Abstract

A cartridge storage slot uses leaf springs to retain the cartridge inside the slot, the springs are biased to provide minimum change in the retaining force when the cartridge width varies.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 80% of the total text.

Storage Receptacle Slot with Biased Retainer Spring

      A cartridge storage slot uses leaf springs to retain the
cartridge inside the slot, the springs are biased to provide minimum
change in the retaining force when the cartridge width varies.

      Based on the linear spring equation and Fig. 1, the force Fi
required to lift the buttons 13 out of the indentations 14 of an ISO
cartridge is:
     Fi= Kx
     where K is the spring constant of the finger 12 and x is the
      depth of the indentation 14.
     and as illustrated in Fig. 2, the force Fp required to lift the
      buttons 13 out of the indentations 24 of a X-PACK is:
     Fp= Kx + Kd
     where d is the depth of the recessed channel 15, and the X-PACK
      has the same indentation depth x.

      With the existing design, x = d, therefore the X-PACK is
subjected to a holding force which is twice larger than that for the
ISO cartridge.  This poses a greater demand on the picker motor.

If the finger has smaller spring constant k and is biased with a
deflection h so that:
     Fi= kx + kh = Kx
     Hence Fp= kx + kh + kd
  therefore, the difference in lifting force is kd.

      As the biased deflection h becomes larger, the spring constant
k and the difference in lifting force can be reduced as Fi remains
the same.

      The preferred embodiment of the storage slot of this invention,
as illustrated in Figs. 3 and 4, comprised:
  o  Two guiding...