Stratasys, Inc.

Acuprint, Inc.

Adobe, Inc.

Evolve Additive Solutions, Inc.

William J Hanson

J Randolph Sanders

Steven A Chillscyzn

Michael W Bacus

James W Comb

Richard I Love

Gerard L Kappenman

R Daniel Putman

An additive manufacturing system comprising a transfer medium configured to receive the layers from a imaging engine, a heater configured to heat the layers on the transfer medium, and a layer transfusion assembly that includes a build platform, and is configured to transfuse the heated layers onto the build platform in a layer-by-layer manner to print a three-dimensional part.

Layer transfusion for heat capacitor belt for additive manufacturing

Layer transfusion with transfixing for additive manufacturing

Layer transfusion for additive manufacturing

Layer transfusion with rotatable belt for additive manufacturing

An additive manufacturing system for printing a three-dimensional part using electrophotography, the additive manufacturing system comprising a rotatable photoconductor component, first and second development stations configured to develop layers of materials on a surface of the rotatable photoconductor component while the rotatable photoconductor component rotates in opposing rotational directions, and a platen configured to operably receive the developed layers in a layer-by-layer manner to print the three-dimensional part from at least a portion of the received layers.

Electrophotography-based additive manufacturing system with reciprocating operation

An additive manufacturing system for printing a three-dimensional part using electrophotography, the additive manufacturing system including a rotatable photoconductor component, a development station configured to develop layers of a material on a surface of the rotatable photoconductor component, a rotatable transfer medium configured to receive the developed layers from the surface of the rotatable photoconductor component, and a platen configured to receive the developed layers from the rotatable transfer medium in a layer-by-layer manner. The additive manufacturing system also includes a plurality of service loops configured to move portions of the rotatable transfer medium at different line speeds while maintaining a net rotational rate of full rotations of the rotatable transfer medium at a substantially steady state.

Electrophotography-based additive manufacturing system with transfer-medium service loops

Layer transfusion with part heating for additive manufacturing

Briefly, the invention provides a method of enhancing pixel data from a raster image to improve the appearance of the rendered image by modifying morphological artifacts which normally occur in raster image systems. The method commences by applying a window to a portion of the raster pixel data from the raster images to define a block of raster pixel data having a predetermined area. The pattern of the block of raster data within the window is then compared with a plurality of predetermined patterns representing morphological artifacts. A determination is made from the comparison whether a substantial match exists between the block of raster data within the window and one or more of the plurality of predetermined patterns. In the event of a match the block of raster data is modified to provide an enhanced block of raster pixel data free of said morphological artifacts. Finally, the window is applied to a different block of raster data and the process is repeated until all of the raster data is free from the undesired morphological artifacts.

Method for enhancing raster pixel data

Apparatus for enhancing the permanence of printed images. A substrate with a heated, fused toner image is passed by a PTFE powder coated roller for selective contact therewith by a pivotable engagement bar. The PTFE particles are adhered only to the desired imprinted areas and not to the non-printed and non-selected areas of the substrate. The powder is dispensed on a selective basis to the surface of the substrate. The invention also includes the method for enhancing the permanence of a printed image on the substrate.

Method for enhancing the permanence of printed images

Magnetic signal level control apparatus for a printer or copier. A continuous sampling of the magnetic characteristics of a reference mark results in constantly adjusting to maintain the specified quality of magnetically readable characters on printed documents. A controller generates a signal which is applied to the developer of the printer to control application of magnetic ink or toner to the photoconductor and consequently to the paper. The invention also includes the method for controlling magnetic signal level.

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Carlsbad, CA, United States of America

William J Hanson