Nystrom, Inc.

Management Graphics, Inc.

Michael J Carroll

Jalil Tlemcani

Patrick K Johnson

Michael F Musch

A fire-resistant, aluminum, cementitious-material-free, insulation-free door adapted to prevent the spread of fire and heat passing therethrough, consists of: a door frame, a door hingedly mounted on the door frame, the door having a bottom wall, a top wall, and side walls, the bottom wall, top wall and side walls enclosing a hollow central core not containing substantial amounts of insulating material, the bottom wall having an outside surface, and the top wall having an outside surface; and a layer of intumescent material on the outside surface of the bottom wall. A heat-activated self-closing mechanism allows the weight of the door to close the door in the vent of fire, by releasing gas from a supporting gas spring.

Fire-resistant door

A fire-resistant, aluminum, cementitious-material-free, insulation-free door adapted to prevent the spread of fire and heat passing therethrough, consists of: a door frame; a door hingedly mounted on the door frame, the door having a bottom wall, a top wall, and side walls, the bottom wall, top wall and side walls enclosing a hollow central core not containing substantial amounts of insulating material, the bottom wall having an outside surface, and the top wall having an outside surface; and a layer of intumescent material on the outside surface of the bottom wall. A heat-activated self-closing mechanism allows the weight of the door to close the door in the event of fire, by releasing gas from a supporting gas spring.

An automatic sheet loader for sheets of photographic film or the like is provided. A first drive assembly is used to drive a sheet of imaging material from a supply toward an imaging station. A second drive assembly, independent of the first drive assembly, drives the sheet of imaging material into the imaging station and subsequently retrieves the sheet from the imaging station. An ejection solenoid is used to eject the sheet from the imaging station for retrieval. During a loading cycle, the first and second drive assemblies are actuated to load the sheet into the imaging station. During a retrieval cycle, the ejection solenoid and second drive means are actuated to retrieve the sheet from the imaging station and drive it into an exposed sheet chamber without loading another sheet into the imaging station. A solenoid actuated light trap is provided between the supply and exposed sheet chambers and the imaging station.

Growing community of inventors

New Brighton, MN, United States of America

Michael J Carroll