Abstract: Disclosed is an escrow module. The escrow module may include a drum, a first belt and a tape. The drum may have a first end, a second end, and an intermediate portion. The first belt may partially encircle the drum. The tape may have a first end attached to the drum and a second end attached to a spool. Upon rotation of the drum in a first direction, a first side of a media object may contact the tape and a second side of the media object may contact the first belt.

Abstract: Disclosed is an escrow module. The escrow module may include a drum, a first belt and a tape, The drum may have a first end, a second end, and an intermediate portion. The first belt may partially encircle the drum. The tape may have a first end attached to the drum and a second end attached to a spool. Upon rotation of the drum in a first direction, a first side of a media object may contact the tape and a second side of the media object may contact the first belt.

Abstract: A three dimensional printing apparatus (100; 200) is disclosed. The 3D printing apparatus comprises a primary and a secondary set of material dispensing units (1; 10) which each have a nozzle (3) for depositing particulate material (5; 220a, 220b; 224; 226) on a build surface (7), where the nozzle defines a through passage (9) for the material. The through passage has an inlet end (11) for receiving the material and an outlet end (15) for dispensing the material. A valve (21) is provided at least one of at, within or in fluid communication with the through passage for controlling flow of the material via the through passage, the valve being operable between open and closed positions. Flow of said material into the through passage is blocked when in the closed position and, when in the open position, flow of the material into the through passage is allowed.

Abstract: A material dispensing unit (1; 10) for a three dimensional printing apparatus (100; 200) has a nozzle (3) for depositing particulate material (5; 220a, 220b; 224; 226) on a build surface (7), where the nozzle defines a through passage (9) for the material. The through passage has an inlet end (11) for receiving the material and an outlet end (15) for dispensing the material. A valve (21) is provided at least one of at, within or in fluid communication with the through passage for controlling flow of the material via the through passage, the valve being operable between open and closed positions. Flow of said material into the through passage is blocked when in the closed position and, when in the open position, flow of the material into the through passage is allowed.