Abstract: An automatic document feeder having a quick release hinge assembly for attachment to a computer input device having a medium receiving surface and an associated aligned flat bed bezel with at least one receiving sleeves includes a plurality of interconnectable modular assemblies where one of the assemblies functions as a hinge mount and includes a set of protrusions complementary in shape to a corresponding set of stops tilts on an attachment hinge secured removably to the hinge mount. The attachment hinge and hinge mount cooperate to permit the automatic document feeder to be swiveling mounted to the computer input device in a precisely aligned manner to facilitate the moving of documents in seriatim from an input tray to an output tray of the automatic document feeder via the medium receiving surface of the computer input device.