The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 07, 1994
Filed:
Jul. 07, 1992
Othmar Stieger, Kindhausen, CH;
Alfred Wenger, Neftenbach, CH;
Elpatronic AG, Zug, CH;
Abstract
The apparatus for checking the volume of bottles (1) comprises a head (2) adapted to be moved sealingly onto the bottle mouth (21), with a metering piston (7) which is displaceable in relation to the head (2) to be inserted into the bottle (1) and compress the air contained therein, and a pressure sensor (9) for measuring the excess pressure produced in the bottle. The measured volume (11) in the bottle is linked to a compensating volume (12) through a duct (10). The compensating volume is determined on the one hand by the constant starting height of the metering piston (7) and on the other hand by the variable displacement path length of the head (2). This ensures that the compression ratios are always the same for bottles of different heights, since differences of bottle height are compensated by a balancing piston (13) in the opposite direction, which alters the compensating volume (12) according to the sealing displacement path of the head (2) and thus always keeps the compressed measured volume exactly constant. The apparatus enables deviations in volume occurring in a series production process for plastic or glass bottles to be determined without the need to supply external air to the bottles. The measuring cycle is initiated by recording the pressure rise when the head (2) is placed upon the container (1).