Modifiche

Also in the second half of the '30s [[Columbus]] started producing models with transparent celluloid that allow to see the ink level, according to the new trend inaugurated by [[Vacumatic]]. From this this period was the birth of the [[Columbus 112]], a [[plunger filler]] model. In 1938 the company obtained a patent ({{Cite patent|IT|288327}}) for a screw piston, which had as a consequence the creation of the [[Columbus 10x|100]] line, equipped with a [[piston filler]] loading system.

Also in the second half of the '30s [[Columbus]] started producing models with transparent celluloid that allow to see the ink level, according to the new trend inaugurated by [[Vacumatic]]. From this this period was the birth of the [[Columbus 112]], a [[plunger filler]] model. In [[1938]] the company obtained a patent ({{Cite patent|IT|288327}}) for a screw piston, which had as a consequence the creation of the [[Columbus 10x|100]] line, equipped with a [[piston filler]] loading system.