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Creata pagina con 'The ''Ink Shut-off'', illustrated in the figure, was just another wrong investment: promoted as a mechanism capable to block the flow of the ink form the pen when the pen ...'
The ''[[Ink Shut-off]]'', illustrated in the figure, was just another wrong investment: promoted as a mechanism capable to block the flow of the ink form the pen when the pen was closed, to prevent leaks because of pressure changes, (as was the case when travelling by plane, activity that was booming) it was indeed ineffective, so that the company was forced to withdraw it from the market by an order from the Federal Trade Commission.