Registering Devices TRIZ Cases

An attachment detector triggers size detection only after cassette insertion, reducing switch timing errors.

A downstream guide prevents the rotary shutter from rotating into the path, reducing sheet damage risk during jam clearance.

Pivoting sensor flags convert sheet width into angular positions for photo-interrupters, eliminating erroneous detection from misaligned side guides.

A roller mechanism generates lateral force via spring pressure and angular offset to maintain paper alignment during transport.