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Another variant is the one patented by [[Soennecken]] in 1930, which provides for an ebonite button hidden by a shell by rotating which you can reach the loading button and operate it, while rotating it in the reverse direction this is returned to the original position, blocking access to the button. Both variants make it possible to overcome another not insignificant problem of the classic version, which is the not insignificant probability of losing the blind cap.<noinclude>
==Notes==
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==Related Patents==
{{ListsPatentsFeature|Button filler}}
[[Category:Translated Pages]]
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