With Lumiglas – you can see something!
The question of how production processes in containers could be optimally monitored was already being asked in the 1960s. Friedrich Horst Papenmeier had the innovative idea for this decades ago. An illuminated sight glass!
His company still uses this invention today.
The electrical engineer Friedrich Horst Papenmeier founded F.H. Papenmeier GmbH & Co. KG in Schwerte. At the end of the 1950s, his company built electrical control systems for mixers in the plastics industry. These mixers were fitted with sight glasses through which the production process could be monitored.
A sight glass was usually installed on the container for viewing and another glass on which an electric light was placed to bring light into the closed container.
A double breakthrough was therefore required: one for the inspection glass and one for the light glass. This solution was costly. In addition, the process had to be permanently monitored in pressurized or vacuum containers.
Wasn’t there a better solution?
Friedrich Horst Papenmeier asked himself this question and developed a “half-moon lamp” that could be placed on the sight glass. This made it possible to illuminate the glass and view it at the same time. A second breakthrough on the container became superfluous.
The idea was patented in 1960 under the name “Electrically illuminated sight glass”. It quickly became established in practice and more and more companies in the chemical, pharmaceutical and food industries benefited from it. Today, the lights are marketed under the name “Lumistar” and use modern LED technology after halogen lamps.
The patented Lumiglas crescent luminaire ‘Lumistar’ laid the foundation for the Lumiglas product range.
Patent certificate for the Lumistar luminaire from 1960