This publication describes the printing of an extra “helper” structure below and around a print to be removed from the build plate of an FFF printer. The print head can be used to exert a force onto the helper structure so as to loosen the print from the build plate. Once the print is loosened from the plate, it can be pushed to the side and be removed from the build plate. It may then be received by a e.g. a bucket or box placed in front of the FFF printer. The build plate will then be complete empty, and can be reused for another print.
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Van Kessel, Jaime; Karmas, Kostas; and Kent, Sam, "Automatic Print Removal using Print Head", Technical Disclosure Commons, (June 18, 2021)