Ball pen - with polyamide or acetal resin radial sleeve

摘要

Ball pen according to DTP 1807078.5-27 has a bushing which acts as the operating knob and can be pushed onto the bushing which receives the end of the lead. Pref. the latter bushing has an outer bead fitted to the i.d. of the knob bushing at the end remote from the lead. The knob bushing has an inner bead corresp. to the o.d. of the bushing which receives the lead.