Curtain construction

Claim 2

A pass-through curtain for suspension by a rod in an opening, said curtain comprising a single integral imperforate sheet of flexible plastic material; said sheet being folded upon itself to define a pair of facing layers joined together by a fold; a weld formed in said layers extending along in parallel-spaced relation with respect to said fold, said fold and weld and the sheet portions intermediate said fold and weld combining to define an open ended tubular formation for removably receiving a suspension rod, said layers having nonsmooth facing surfaces to prevent adherence of said layers.

Claim 3

A curtain according to claim 1, said layers each being formed with a plurality of generally parallel cuts extending inwardly through the edge remote from said tubular formation toward and terminating short of said weld, said cuts of respective layers being offset with respect to each other.

Claim 4

A curtain according to claim 2, said layers having smooth nonfacing surfaces for sanitation.

Claim 5

A curtain according to claim 3, said plastic material being thermoplastic and of greater flexibility at elevated temperature, for enhanced closure about articles in said opening.

Claim 6

A curtain according to claim 3, said plastic material being polyvinyl chloride having a thickness of approximately one-sixteenth inch.

Claim 7

A curtain according to claim 5, said plastic material including antimicrobial material. 7 A curtain according to claim 3, said facing layer surfaces being formed with grooves to define said nonsmooth surface.

Claim 8

A pass-through curtain for suspension in an opening, said curtain comprising a single integral imperforate sheet of flexible plastic material; said sheet being folded upon itself to define a pair of facing layers joined together by a fold; a weld formed in said layers extending along and in parallel spaced relation with respect to said fold, said layers having nonsmooth facing surfaces to prevent adherence of said layers and smooth nonfacing surfaces for sanitation; said plastic material being polyvinyl chloride thermoplastic having a thickness of approximately one-sixteenth inch, for increased flexibility at elevated temperature and enhanced closure about articles in said opening.

Claim 9

A pass-through curtain for suspension in an opening, said curtain comprising a single integral imperforate sheet of flexible plastic material; said sheet being folded upon itself to define a pair of facing layers joined together by a fold; a weld formed in said layers extending along and in parallel spaced relation with respect to said fold, said layers having nonsmooth facing surfaces to prevent adherence of said layers and smooth nonfacing surfaces for sanitation; said plastic material being polyvinyl chloride thermoplastic having a thickness of approximately one-sixteenth inch, for increased flexibility at elevated temperature and enhanced closure about articles in said opening.