Hewlett-packard Development Company, L.p.

Hewlett-packard Development, L.p.

Peridot Print LLC

Geoffrey Schmid

Shannon Reuben Woodruff

Carolin Fleischmann

Kevin T Kersey

Ali Emamjomeh

Timothy J Carlin

Yi Feng

Erica Montei Fung

John A Dangelewicz

Jacob Wright

Michael A Novick

Blair A Butler

M Derek Patton

Paul Fishbein

Xiaoqi Zhou

Alexey S Kabalnov

David Edmondson

Jake Wright

Stephan Walter Emmenegger

Bernardo A Gutierrez

Alan Joseph Senior

Behrang Khorsandian

Edward Stanley Ponomarev

Henric Larsson

Jonathan Olson

Kira N Ellsaesser

Jacob Tyler Wright

In one example, a process for depowdering an elastic object made with a 3D printer using powdered build material includes compressing the object progressively from one end of the object to another end of the object.

Depowdering an elastic 3D printed object

A multi-fluid kit for three-dimensional printing includes a fusing agent and a fluorescing detailing agent. The fusing agent includes water and a radiation absorber. The radiation absorber absorbs radiation energy and converts the radiation energy to heat. The fluorescing detailing agent includes water and a fluorescent colorant that is active by exposure to ultraviolet energy to emit light in the visible range of from about 400 nm to about 780 nm. The multi-fluid kit is devoid of a second detailing agent and a second fluorescent colorant.

Three-dimensional printing

This disclosure relates to a material set including a build material for 3-D printing including particles of a polymer comprising polymer chains having at least one reactive group that is protected with a protecting group. The material set further includes an inkjet composition including a de-protecting agent for removal of the protecting group, and a liquid carrier.

3-D printing

An example of an anti-coalescing agent for a three-dimensional (3D) printing process includes a vehicle and an anti-coalescing polymer dispersed in the vehicle. The vehicle includes a co-solvent, a surfactant, a humectant, and water. The anti-coalescing polymer has a mean particle size ranging from about 50 nm to about 195 nm, and the anti-coalescing polymer is to coat polymeric build material particles to prevent the polymeric build material particles from coalescing during electromagnetic radiation exposure of the 3D printing process.

Anti-coalescing agent for three-dimensional printing

This disclosure relates to a method of 3-D printing comprising: applying a layer of build material onto a print platform, wherein the build material comprises particles of a polymer comprising polymer chains having at least one reactive group that is protected with a protecting group; printing a de-protecting agent at selected locations on the layer of build material; and coalescing particles of the polymer at the printed locations on the layer of build material to form a coalesced polymer layer.

In an example of a method for 3D printing, a polymeric or polymeric composite build material is applied. Some of the build material is negatively patterned to define a removable build material portion and a remaining build material portion. The negatively patterning includes selectively applying an anti-coalescing polymer solution including a polymer having a pendant reactive functional group, and selectively applying an anti-coalescing crosslinker solution including a multifunctional crosslinker. The pendant reactive functional group and the multifunctional crosslinker react to form an insoluble gel network among the polymeric or polymeric composite build material in the removable build material portion. Based on a 3D object model, a layer of a final 3D object is formed from at least some of the remaining build material portion. The some of the polymeric or polymeric composite build material in the removable build material portion remains physically separated from the layer.

In a coating method example, a coating is formed on a part precursor by blasting the part precursor with a blast medium. The blast medium includes blasting beads and a coating agent. The part precursor is formed from a polymeric build material, and a hardness of the blasting beads is greater than a hardness of the polymeric build material.

Coating part precursors

An art frame includes a three-dimensional supporting frame having an image receiving surface and a back surface opposed thereto, and a center portion defining a perimeter from which at least three foldable extensions extend. Each foldable extension includes no less than four folds folded toward the back surface to form a frame portion having an outer wall substantially perpendicular to the back surface, and an inner wall substantially perpendicular to the back surface and substantially parallel to the outer wall. A compressible member is attached to the outer walls to adhere an image receiving medium to the supporting frame. Compressible member includes a first adhesive on the outer walls, a polymer foam substrate (having a compression index ranging from about 0.4 to about 0.8) on the first adhesive, and a second adhesive on the polymer foam substrate. Second adhesive is to secure the image receiving medium to the supporting frame.

Art frames

A surface has a vacuum and a vacuum relief.

Vacuum relief

In one embodiment, an aerosol particle collector includes a duct defining a flow path configured to remove larger particles from aerosol flowing through the duct and to store the removed particles in the duct while maintaining a uniform rate of aerosol flow throughout a predetermined useful life of the duct even as stored aerosol particles accumulate in the duct. In another embodiment, an aerosol particle collector includes a duct and a plurality of baffles in the duct. The duct has an elongated inlet extending along a length of the duct and an outlet located at one end of the length of the duct. A first one of the baffles extends along a first side of the duct for deflecting incoming aerosol toward a second side of the duct opposite the first side. A second one of the baffles is for deflecting aerosol toward the outlet.

Aerosol particle collection

Various methods and apparatuses are disclosed for handling a sheet, wherein at least one projection extends across a stack of sheets such that corners of the sheet are bent when being lifted from the stack.

Sheet lifting with corner projections

A system for supporting print media includes a support manifold, a first media support plate configured to be supported by the support manifold, and a second media support plate configured to be interchanged with the first media support plate and supported by the support manifold in place of the first media support plate. The first media support plate is configured to support print media of a first size, and the second media support plate is configured to support print media of a second size different from the first size.

Print media support system and method

An ink collection system includes at least one target surface and a fluid supply system in communication with the at least one target surface. The fluid supply system is configured to create a film of fluid across at least a portion of the at least one target surface, and wherein the film of fluid flushes away ink that impinges on the at least one target surface.

Growing community of inventors

San Diego, CA, United States of America

Geoffrey Schmid