Patent ID: 9554681
Date: 2017-01-31
CPC Classifications: A47L,Y10T

Claim:
1. A vacuum-cleaning apparatus with a vacuum-cleaner unit and a filter bag, the filter bag comprising a flat bag, a nonwoven filter bag and a disposable filter bag, the vacuum-cleaner unit comprising a filter-bag accommodating chamber with rigid walls, the filter-bag accommodating chamber comprising an opening which can be closed by a flap and has a predetermined opening area, through which the filter bag can be inserted into the filter-bag accommodating chamber, the vacuum-cleaning apparatus comprising a ratio between an area of a rectangle corresponding to the opening area and an area of the filter bag wherein the ratio is greater than 0.70, and wherein a ratio between a surface of the filter-bag accommodating chamber and a surface of the filter bag is greater than 0.90.