Graco Minnesota Inc.

Steven H Fredrickson

Thomas L Triplett

Christopher A Lins

Barry W Mattson

James C Schroeder

Charles W Dawson

Roland M Bedard

Bradley K Voigt

Steven J Wrobel

A mobile thermoplastic applicator comprises a kettle, a main gas burner, a heat exchanger plenum, and a screed die box. The kettle has walls which define an interior space for melting thermoplastic. The main gas burner is situated beneath the kettle, and is configured to heat the kettle. The heat exchanger plenum is situated inside the thermoplastic kettle and is configured to subdivide the interior space and circulate heated air from the main gas burner. The screed die box is configured to receive molten thermoplastic from the kettle and deposit that molten thermoplastic on a surface.

Mobile applicator for thermo pavement marking

A screed die box includes a screed die bucket, a screed die box gate, a screed die box lever, a screed plate, and a positioning member. The screed die box gas is slidably connected at the bottom of the screed die bucket. The screed die box lever is rotatably connected to the screed die bucket and the screed die box gate for sliding the screed die box gate between an open position and a closed position. The screed plate is slidably connected along an aft side of the screed die bucket and includes a positioning aperture. The positioning member is located in the screed die bucket and engages the screed plate, the positioning member sliding the screed plate as the positioning member is rotated.

Thermoplastic die box with quick height adjustment mechanism

Mobile applicator lid with seal arrangement

A flame safety system for a thermoplastic applicator comprises a gas burner and a flame indicator. The gas burner expels a jet of pressurized combustible gas from an outlet nozzle, and includes an attachment groove near the nozzle. The flame indicator includes an attachment ring configured to fit into the groove, thereby securing the flame indicator to the gas burner, and a flame path portion extending from the attachment ring into the jet of pressurized combustible gas. The flame path portion is formed from a material which incandescently glows whenever the jet of combustible pressurized gas is lit.

Flame indicator

An adjustable spacer platemounts over the US standard screed boxthermoplastic openingof 0.125&#x2033; and creates a 0.090&#x2033; opening.[This eliminates the need for the user to buy another costly screed box.] For screeding over stencils, the spacercan be flipped to create a zero clearance opening. This allows the thermoplastic to come out only when an opening in the stencil pattern is present. Also, as the diewears down, the spacer can be removed which lets the standard size opening be used as a substitute for the 0.090&#x2033; opening.

Screed die adjustable line thickness

Thermal line striper

Paint sprayer

Growing community of inventors

Minneapolis, MN, United States of America

Steven H Fredrickson