Device for preventing erroneous insertion of a plurality of print substrates into corresponding connectors in a rack

DETAILED DESCRIPTION An object of the invention, therefore, is to provide a device for preventing erroneous insertion of a plurality of print substrates into corresponding connectors in a rack, which can eliminate the above mentioned drawbacks which have been encountered with the prior art techniques, which can discriminate whether or not the print substrates are correctly inserted into corresponding connectors one by one in an easy and rapid manner and which can ensure a reliable operation of the print substrate after it has been subjected to treatments such as assembly, check, repair, adjustment or the like.
A feature of the invention is the provision in a device for preventing an erroneous insertion of a plurality of print substrates into corresponding connectors in a rack, comprising a rack provided therein with connectors and a plurality of print substrates adapted to be inserted into corresponding connectors in the rack, of the improvement comprising engagement mechanisms detachably mounted on respective print substrates and having engagement portions, the engagement portions of each engagement mechanism being snugly engaged with corresponding engagement portions of adjacent engagement mechanism only when the print substrates are correctly inserted into corresponding connectors in the rack.
Further objects and features of the invention will be fully understood from the following detailed description with reference to the accompanying drawings, wherein: