It's been a decade or so since this query was first posted, so it's very possible that you've already discovered the "gold mines" at findagrave.com, where quite a bit of death/birth info is already listed for this PUCHTA family:

William David PUCHTA, born 30 December 1870 and died 21 July 1936; buried at Union Cemetery in Milwaukee with "Mamma" Emma ROEHRBORN PUCHTA who was born 20 February 1873 and died 20 June 1912.

There are also at least 5 additional PUCHTA names at Union Cemetery, so some of these other burial listings may fill in other missing "holes" in your research.

Good luck, and please give us volunteer researchers an updated summary of what you now have and what you're still looking for. (Thanks...that helps us focus our efforts on more specific and beneficial things for you.)