Pillowcase

Abstract

A volume-adjustable housing with a helical zipper element that extends around the edge of the cylindrical housing to adjust the height and volume of the cushioning element. The article is for use with cushioning elements or simple soft padding. A helical zipper element that is configured to rotate 360 ​​degrees or more on one or more edges of the housing is used to adjust the amount of height of the cushioning element that is enclosed in an advanced compounding method. 1.1) A top front perspective view showing an unengaged helical zipper; 1.2) A top view showing a helical zipper with the ends unengaged; 1.3) A bottom view showing a helical zipper with both ends unengaged; 1.4) A front view showing unengaged helical zipper elements; 1.5) A back view showing unengaged helical zipper elements; 1.6) A right side view showing a helical zipper with the ends unengaged; 1.7) A left side view showing a helical zipper with the ends unengaged; 1.8) A front view showing an alternative position of the helical zipper; 1.9) A front view: an alternative position of the advanced helical zipper; 1.10) A front view: an alternative position of the helical zipper further advanced; 1.11) A top view showing an alternative position of the helical zipper of 1.10; 1.12) A front view showing a fully closed helical zipper; 1.13) A top view showing a fully closed helical zipper on both ends; 1.14) A top front perspective view showing the helical zipper closed at one end; 1.15) A rear view showing another position of the helical zipper; 1.16) Rear view: Another position of the advanced helical zipper; 1.17) Rear view: Another position of the further advanced helical zipper; 1.18) Rear view showing the fully closed helical zipper.

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