| 摘要 |
There is a marker configured to dispense a fluid. The marker includes a fluid container configured to store a fluid. The marker also includes a dispenser configured to selectably dispense a fluid. The marker further includes a tip head coupled to the dispenser, wherein the tip head includes a substantially rigid frontal profile configured to apply the fluid from the dispenser to a surface in a two-dimensional shape substantially identical to the frontal profile. The tip head is selectably removable; wherein the tip head includes a plurality of tip heads each having substantially different frontal profiles. The tip head further includes a daubing protrusion. The marker includes a fluid disposed within the fluid container, wherein the fluid is a machine readable ink. The marker also includes an eraser coupled to the fluid container, opposite of the dispenser, respectively, and configured to erase the fluid deposited on a paper substrate.
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