US 6,718,882 B1Granted

Two-way-burning sparkler and method of manufacture

AssigneeHunter Pacific Limited

InventorQui Fu Sheng

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Abstract

A sparkler for use as a fireworks display is provided. The sparkler has an extended spark display time, burning and emitting sparks in one direction initially followed by the spark progression reversing direction and then burning while emitting sparks in the reverse direction. The sparkler construction provides inner and outer sheaths of a flammable spark composition separated by an insulating layer of a fire resistant material. The inner and outer layers are in contact with one another at one end of the sheath, to permit ignition of the inner flammable composition by the progressing spark. Especially preferred is a construction of the aforesaid sparkler which emits sparks of one color upon the initial burn and sparks of a different color upon the reverse burn. Also provided is a process for the manufacture of these novel sparklers.

Claims13

Dependent claims

A fireworks display article of manufacture, being a sparkler, said article comprising:

an elongate central core having a first coating thereon of an ignitable, flammable, spark-emitting-upon-ignition material, said first coating extending along the length of said core a first distance from one end thereof, leaving a portion of said core bare at the end thereof opposite said one end,
said core and first coating having a second coating thereon extending along the outside of said first coating from and including said one end, along the length thereof a second distance from said one end, said second coating being of a fire resistant material,
said core, first coating and second coating having a third coating thereon, said third coating being of an ignitable, flammable, spark-emitting-upon-ignition material, said third coating extending along the outside of and along the length of said core and first and second coatings to a third distance from and including said one end, wherein,
said first and third distances both exceed said second distance.

1 more element

Dependencies are inferred from the claim text.