US 2015/0306626 A1Published application

Method for dispensing an adhesive

AssigneeNordson Corporation

InventorLeonard J. Lanier

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Abstract

A dispensing module and method of dispensing an adhesive includes a dispenser body assembly having a liquid supply passage, a nozzle member having a liquid passageway, a valve element, and a valve seat. The liquid passageway includes a discharge passageway defining an outlet, a first converging surface, a bore, and a shoulder positioned between the first converging surface and the bore. The valve element extends along an axis within the liquid passageway and has a bulbous end portion movable along the axis between an open position and a closed position. The bulbous end portion has a valve needle smaller than the bore to inhibit obstruction to the discharge passageway for adhesive flowing thereto. The valve seat seals against the bulbous end portion in the closed position such that a region of the valve needle projects into the discharge passageway for inhibiting clogging of the adhesive proximate to the outlet.

Claims4

Dependent claims

A method of dispensing an adhesive from an adhesive module having a nozzle and a valve element, the nozzle including a liquid passageway and the valve element extending along an axis and having a bulbous end portion movable along the axis between an open position and a closed position, the bulbous end portion having a valve needle distally projecting therefrom along the axis, the method comprising;

forcing the adhesive through a discharge passageway of the liquid passageway while the bulbous end portion of the valve element is in the open position to discharge the adhesive from an outlet of the discharge passageway;
moving the valve element from the open position toward the closed position and moving the valve needle through a bore toward the discharge passageway while inhibiting obstruction of the discharge passageway as the valve needle moves through the bore;
moving the valve element to the closed position to generate a localized pressure within the adhesive and cutting off the adhesive discharging from the outlet;
and
inserting at least a region of the valve needle into the discharge passageway to inhibit clogging of the adhesive proximate to the outlet.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/794,248Filed 8 Jul 2015
Priority: 31 Oct 2013
Published: 29 Oct 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

B05C 5/0229
Characterised by flow controlling means, e.g. valves, located proximate the outlet: the valve being a gate valve or a sliding valve
B05B 15/5225
The cleaning element, e.g. a needle, and the discharge opening being movable relative to each other in a direction substantially parallel to the…:…
B05C 5/0225
The liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in…:…
B05B 1/3046
The controlling element being a lift valve: the valve element, e.g. a needle, co-operating with a valve seat located downstream of the valve…

Family

Application14/068,936Division · filed 31 Oct 2013
Application14/794,248Division
US 2015/0114999 A1Published application
US 9,126,223 B2Related patent
US 9,550,204 B2Related patent
US 2015/0306626 A1This patent

From the US filing history. Foreign family members aren’t listed.