Capless retractable sealed marking instruments

Capless retractable sealed marking instruments have a single piece elastomeric seal incorporated in a marker casing. The seal includes an annular rim and a concave disk with cooperative sealing disk halves having lateral sealing surfaces which are moved out of contact by a linearly advanced marker n...

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Bibliographic Details
Main Authors BROWN; PATRICK W, BLAUSTEIN; LAWRENCE A, VANDERLINDEN; SHANE
Format Patent
LanguageEnglish
Published 07.03.2000
Edition7
Subjects
BUREAU ACCESSORIES
IMPLEMENTS FOR WRITING OR DRAWING
PERFORMING OPERATIONS
TRANSPORTING
WRITING OR DRAWING IMPLEMENTS
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Summary:Capless retractable sealed marking instruments have a single piece elastomeric seal incorporated in a marker casing. The seal includes an annular rim and a concave disk with cooperative sealing disk halves having lateral sealing surfaces which are moved out of contact by a linearly advanced marker nib to open the seal for extension of the marker nib. The concave configuration of the disk provides maximum sealing force between the lateral sealing surfaces of the disk halves. Retraction of the marker nib draws the disk halves back into the concave sealed configuration to protect the marker nib and cartridge from atmospheric degradation.
Bibliography:Application Number: US19960722907