Vertical cyclically operating flat sack machine

Vertical cyclically working flat sack machine (1) for packaging flowable or pourable materials or objects in flat sacks formed from opposed foil sheets aligned in a common vertical foil plane comprising a machine frame, means for feeding the foil sheets into the machine, a measurer (3) with filling means (5) mounted to the machine frame for depositing flowable materials between the foils, a deflector (8) for guiding the foils into an opposed parallel relationship positioned on opposite sides of the measurer and filling means, a sealer (15) positioned below the filling means and adapted to engage and seal the foils together, a discharge device (29) downstream from the sealer, and longitudinal and transverse cutters positioned adjacent the discharge device, the sealer (15) including two symmetrically fashioned units (16, 17) positioned on opposite sides of the foil plane, each comprising a pivot spar (18, 18'), a sealer spar support (20, 20') mounted to each pivot spar, a sealer spar (21, 21') mounted to each pivot spar support, and, a heating plate (23, 23') and a clamping plate (24, 24') mounted on and supported by each sealer spar, with each clamping plate having elongated longitudinal and transverse sealing tools (25, 25', 26, 26') mounted thereupon, wherein the units (16, 17) each are movable horizontally toward and away from the foil plane to enable the units to be pivotable from a sealing position extending parallel to the foil plane (9) when the units are moved away from the foil plane, about a pivot axis (19, 19') approximately 90.degree. with respect to the foil plane into a fitting and cleaning position, wherein the sealing tools and the clamping plates are positioned mainly above a horizontal plane connecting the pivot axes displaced from the foil plane and filling means to facilitate cleaning and replacement of the sealing tools.