Patent ID: 7001091
Filing Date: 2006-02-21
Classification: B43K,C09D

Abstract:
1. A pen, comprising: a housing; a first reservoir inside said housing and configured to contain a first fluid, said first reservoir comprising a first opening configured to dispense said first fluid; a second reservoir inside said housing and configured to contain a second fluid, said second reservoir comprising a second opening configured to dispense said second fluid; a first writing tip extending from said housing and configured to dispense a substantially homogeneously mixed fluid to a writing surface; a mixing region connected to said first and second openings and said first writing tip and configured to substantially homogeneously mix said first and second fluids and dispense said substantially homogeneously mixed fluid to said first writing tip; and a second writing tip extendable from said housing and configured to receive only said first fluid and to dispense said first fluid unmixed with said second fluid to said writing surface.