MULTI-FILAMENT THREE-DIMENSIONAL PRINTING
First Claim
1. A device comprising:
- a first tube defining a first interior channel;
a second tube defining a second interior channel;
a first drive system including a first drive gear positioned to drive a first filament of material into the first interior channel at a first input end of the first tube;
a second drive system including a second drive gear positioned to drive a second filament of material into the second interior channel at a second input end of the second tube; and
an extruder coupled to a first output end of the first tube and to a second output end of the second tube, the extruder including a rotary drive gear, the extruder defining at least one extrusion opening, the rotary drive gear rotatable in a first direction to advance the first filament toward the at least one extrusion opening, and the rotary drive gear rotatable in a second direction opposite the first direction to advance the second filament toward the at least one extrusion opening.
1 Assignment
0 Petitions
Accused Products
Abstract
An extruder of a three-dimensional printer may be coupled with one or more filament tubes, each filament tube having its own supply of filament. The extruder may include a drive gear rotatable in a first direction to advance a filament from a filament tube toward at least one extrusion opening defined by the extruder and rotatable in a second direction, opposite the first direction, to advance another filament from a different filament tube toward the at least one extrusion opening defined by the extruder. Also, as one filament is advanced by the drive gear, another filament may be retracted by the drive gear to improve the switching of filaments in a three-dimensional printing process. The extruder may work in conjunction with a filament supply-side drive system that feeds filament into one or more filament tubes, reducing a pull force exerted by the drive gear of the extruder.
20 Citations
20 Claims
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1. A device comprising:
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a first tube defining a first interior channel; a second tube defining a second interior channel; a first drive system including a first drive gear positioned to drive a first filament of material into the first interior channel at a first input end of the first tube; a second drive system including a second drive gear positioned to drive a second filament of material into the second interior channel at a second input end of the second tube; and an extruder coupled to a first output end of the first tube and to a second output end of the second tube, the extruder including a rotary drive gear, the extruder defining at least one extrusion opening, the rotary drive gear rotatable in a first direction to advance the first filament toward the at least one extrusion opening, and the rotary drive gear rotatable in a second direction opposite the first direction to advance the second filament toward the at least one extrusion opening. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification