A simultaneous cassette withdrawal restriction mechanism for use with an image forming apparatus provided with a plurality of cassettes includes a projection provided on each cassette; a connecting rod; and an engageable member which is adapted for engaging with the corresponding projection, the...http://www.google.co.uk/patents/US5845899?utm_source=gb-gplus-sharePatent US5845899 - Cassette withdrawing mechanism for use with an image forming apparatus
