초록 ▼

A powder applicator for applying powder to form a side stripe to the interior of can bodies along side seams thereof. The powder applicator includes a device for providing a layering effect on the gas entrained powder so that although the powder is normally carried by the gaseous stream it is direct

A powder applicator for applying powder to form a side stripe to the interior of can bodies along side seams thereof. The powder applicator includes a device for providing a layering effect on the gas entrained powder so that although the powder is normally carried by the gaseous stream it is directed into an orifice of a nozzle as a dense stream with the carrier gas forming a separate layer. In addition, the applicator forms a seal with the interior of the can body to define a limited sealed area within which the powder may pass. This sealed area contains corona charging pins which are arranged in a longitudinal line so that a maximum charging of the powder may be effected. Also, a diffused gas is directed into the sealed area to prevent the powder from clinging to the side walls of the sealed area and the charging pins.

대표청구항 ▼

A powder applicator comprising a discharge nozzle having an orifice for directing powder in a stream, a supply line for directing gas entrained powder towards said nozzle, de-entraining means in advance of said nozzle for de-entraining the powder and effecting the supplying of the gas and the powder

A powder applicator comprising a discharge nozzle having an orifice for directing powder in a stream, a supply line for directing gas entrained powder towards said nozzle, de-entraining means in advance of said nozzle for de-entraining the powder and effecting the supplying of the gas and the powder in separate layers to said nozzle with the powder being concentrated in a preselected sector of said nozzle for effecting the discharging of the powder in a dense stream, and support means for determining a fixed path of axial movement for article portions to be coated, said nozzle orifice opening generally in the direction of article movement and having an axis disposed generally axially coextensive with but at a fixed angle to said axial path, and said orifice sector being disposed adjacent said path. A powder applicator for applying a stripe of powder to a tubular body side seam, said powder applicator comprising support means for supporting tubular bodies for movement along a predetermined path, nozzle means for applying powder as a stripe to the interiors of tubular bodies, said support means carrying downstream of said nozzle sealing means for engaging the interior of each tubular body on opposite sides of the portion to be coated and said support means together with said sealing means forming with each tubular body a confined area within which discharged powder may flow, said support means carrying elements formed of porous material defining side walls of said confined area, and gas supply means for directing gas through said porous material elements.