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A notable variant of the [[safety filler]] is the peculiar filling system adopted by [[Moore]] for its ''[[Non-Leakable]]'' pens, for which three distinct patents were filed, one in 1893 ({{Cite patent|US|501895}}) and two in 1896 ({{Cite patent|US|567151}} and {{Cite patent|US|567152}}). The principle is always to use a recessed nib assembly, but in this case instead of using a helical screw, there is a linear sliding type.  

A notable variant of the [[safety filler]] is the peculiar filling system adopted by [[Moore]] for its ''[[Non-Leakable]]'' pens, for which three distinct patents were filed, one in 1893 ({{Cite patent|US|501895}}) and two in 1896 ({{Cite patent|US|567151}} and {{Cite patent|US|567152}}). The principle is always to use a recessed nib assembly, but in this case instead of using a helical screw, there is a linear sliding type.

[[Image:NonLeakableSchema.svg|center|500px|Diagram of a pen with [[Non-Leakable]] filler ]]

[[Image:NonLeakableSchema.svg|center|500px|Diagram of a pen with [[Non-Leakable]] filler ]]