Pencil lead for writing, drawing and painting instruments

The present invention provides a lead for writing, drawing and painting utensils has a colorant lead core and at least one lead coat extending in the direction of the longitudinal axis. The at least one lead coat envelopes the lead core as seen in cross section of the lead and the lead coat and lead...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	REINER JUERGEN, LEHRER CHRISTA, NEIN ROBERT, HEINDL MAX, THIES ANDREAS, DELAPIERRE CHRISTINE, OCHSENKUEHN FRANZ
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	BUREAU ACCESSORIES IMPLEMENTS FOR WRITING OR DRAWING PERFORMING OPERATIONS TRANSPORTING WRITING OR DRAWING IMPLEMENTS
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Beschreibung
Zusammenfassung:	The present invention provides a lead for writing, drawing and painting utensils has a colorant lead core and at least one lead coat extending in the direction of the longitudinal axis. The at least one lead coat envelopes the lead core as seen in cross section of the lead and the lead coat and lead core are immovably mounted relative to each other. The at least one lead coat has a higher bendingstrength than the lead core.