Stratasys, Inc.

Dragsholm Wireless Holdings LLC

Applied Materials, Inc.

Applied Materials Israel Limited

Objet Geometries Ltd.

Objet Ltd.

Alexander Libinson

Eliahu M Kritchman

Guy Menchik

Haim Feldman

Steven Robert Rogers

Scott Beaver

Yoav Bressler

Moshe Levi

Andrew James Carlson

Nathaniel Michael Peterson

Daniel Dikovsky

Boris Golberg

Evgeni Levin

Boris Goldberg

Daniel I Some

Mayan Rumbak

Kevin Ready Campion

Adam Joseph Livingston

Shmuel Rubin

Robert Earl Simon

Jonathan Bennhard Hedlund

Michael Deriugin

Mordechay Sokuler

Vitali Krasnopolsky

Yuval Frid

Shoval Silbert

Scott Wayne Beaver

A method of printing a three-dimensional object () including: providing a 3D inkjet printing system including: a printing chamber () accommodating a printing unit () having an inkjet printing head and a curing subunit (), and a supply unit () including a modeling material and a support material; and printing the 3D object () in multiple consecutive layers according to a predefined printing sequence, wherein for at least one of the multiple consecutive layers the predefined printing sequence for the same respective layer includes depositing and curing the modeling material and the support material separately from each other either in time or in space. Some embodiments may include controlling a concentration of oxygen in the printing chamber () to be in a predefined oxygen concentration range. Some embodiments may include controlling a temperature in the printing chamber () to be in a predefined temperature range.

System and method of printing three-dimensional objects having improved surface properties

A waste management system for an AM device includes a waste container, an air cleaning device installed within an enclosure of the AM device, a first conduit and at least one second conduit. The air cleaning device condense vapors formed within an enclosure of the AM device during operation of the AM device. The first conduit directs the condensed vapors in a liquid state from the air cleaning device to the waste container and the at least one second conduit directs waste accumulated during operation of the AM device to the waste container. The waste container stores waste accumulated by the AM device during operation of the AM device.

System and method for waste management in an additive manufacturing process

An additive manufacturing method for printing an object includes receiving three-dimensional printing data corresponding to the object, defining an internal region of the object to be formed with a structured air pocket and printing the object with an additive manufacturing system. The object includes an internal region formed with a structured air pocket.

Method for additive manufacturing an object

A printing head for inkjet printing comprises: a manifold having a channel for holding material formulation therein; and an array of controllable nozzles fluidly connected to the channel for dispensing the material formulation by inkjet technology. In an embodiment, the array of nozzles is characterized by a pitch that varies along the array. In an embodiment, the nozzles are arranged over a curved line engaging a horizontal plane.

Printing head for non-cartesian inkjet printing

A method of additive manufacturing of a three-dimensional object, comprises: sequentially dispensing and solidifying layers to form on a surface a sacrificial structure. In embodiments the sacrificial structure comprises a bulk volume and heating cells embedded in the bulk volume, where the heating cells release more heat than the bulk volume upon the solidification of the layers. In embodiments, the sacrificial structure comprises pinning structures embedded in the bulk volume. The method also comprises sequentially dispensing and solidifying layers to form the three-dimensional object on a portion of the sacrificial structure.

Method and system for reducing curling in additive manufacturing

A method of providing nozzle calibration parameters for a 3D printer comprises: printing an arc pattern, printing an X-Y align pattern, and printing a head calibration pattern, measuring actual positions of drops, calculating deviations of said measured actual positions from expected positions, and calculating calibration parameters to correct for the deviations. Indicator drops may be used to allow built-in image recognition to find the calibration drops, and a cam system is provided to guide nozzle wipers.

Operation of printing nozzles in additive manufacture and apparatus for cleaning printing nozzles

A system for three-dimensional printing is disclosed. The system comprises: a rotary tray configured to rotate about a vertical axis; a printing head, each having a plurality of separated nozzles; and a controller configured for controlling the inkjet printing head to dispense, during the rotation, droplets of building material in layers, such as to print a three-dimensional object on the tray.

Method and system for rotational 3D printing

System for controlling fabrication of three-dimensional objects, layer by layer are disclosed. The system includes a printing assembly having an irradiation unit and a printing head, the printing assembly is movable between a printing area and a service area. The system further includes a light sensor positioned at the service area to measure the output radiation power of the irradiation unit and a controller to receive information from the sensor and to automatically adjust the electrical power supplied to the irradiation unit.

Methods for monitoring electro-magnetic radiation power in solid freeform fabrication systems

Embodiments of the present invention are directed to a system and method for controlling fabrication of three-dimensional objects, layer by layer, the system comprising a printing assembly, including an irradiation unit and a printing head, the printing assembly is movable between a printing area and a service area. A light sensor positioned at the service area to measure output radiation power of the irradiation unit at a printing plane and a controller to receive information from the sensor and to automatically adjust electrical power supplied to the irradiation unit based on the information.

Method and apparatus for monitoring electro-magnetic radiation power in solid freeform fabrication systems

A printing method includes controlling timing parameters for application of electrical pulses to a piezoelectric nozzle of an inkjet printing head so as to dispense droplets of a material from the nozzle. The timing parameters are controlled to introduce gas bubbles into the droplets of material so as to reduce the density of the material to a selected density value that is less than a natural density of the material.

Controlling density of dispensed printing material

Embodiments of the invention are directed to systems and methods for accurate positioning of a unit movable by a drive system. The method may include adjusting tension of a resilient element of the drive system to reduce hysteresis motion errors of the resilient element below a predetermined threshold by performing measurements of the hysteresis motion errors of the resilient element for two or more tension values and selecting a tension value for which the hysteresis motion error is below the threshold.

Method and apparatus for accurate positioning of printing units

Method and apparatus for polymerizing photoactive materials included in a liquid material by electromagnetic radiation, by dispensing the liquid material layer-wise into a container and irradiating the accumulated layers by a curing radiation, wherein a substantial part of the radiation is well transmitted through the photoactive material.

Method and apparatus for curing waste containing photopolymeric components

Data is written on a plurality of data tracks on an optical disk by a plurality of laser beams. The spots illuminated by the beams are spaced apart to prevent thermal interference. The spots are aligned along a line at an angle to the tangent of the data tracks. The angle of the line of spots is determined by an equation using variables that include the track pitch, the minimum distance between spots and the difference in track numbers between tracks being written.

Method and apparatus for writing on an optical disk with beam spots aligned at an angle to data tracks

Apparatus for optical assessment of a sample includes a radiation source, adapted to generate a beam of coherent radiation, and traveling lens optics, adapted to focus the beam so as to generate first and second spots on a surface of the sample and to scan the spots together over the surface. The distance between the first and second spots is responsive to a pitch of a repetitive pattern of the sample. Collection optics are positioned to collect the radiation scattered from the first and second spots and to focus the collected radiation so as to generate an interference pattern. A detector detects a change in the interference pattern.

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Holon, Israel

Alexander Libinson