Casting of alpha-chloroacrylic ester polymers

Claim 1

A MOLD FOR CASTING MASS POLYMER SHEETS FROM POLYMERIZABLE A-CHLOROACRYLI ACID ESTERS, COMPRISING A PAIR OF SIMILARLY SHAPED GLASS PLATES UNIFORMLY SPACED APART IN FACE-TO-FACE PARALLEL RELATION WITH THEIR CORRESPONDING EDGES MUTUALLY ALIGNED, AND A STRIP OF FLEXIBLE CELLULOSIC SHEET MATERIAL EXTENDING ALONG AND INTERCONNECTING THE EXTERNAL EDGE SURFACES OF THE PLATES, AND ENCLOSING THE SPACE BETWEEN THEM EXCEPT FOR A FILLER OPENING, SAID STRIP HAVING ITS SURFACE COATED WITH AN ADHESIVE PROTEIN DEPOSITED FROM A FILM-FORMING SOLUTION THEREOF IN A VOLATILE SOLVENT AND ADHERING THEREBY TO THE EDGES OF THE GLASS PLATES TO FORM A LEAKPROOF SEAL AT THE EDGES THEREOF, THE PORTION OF SAID STRIP INTERCONNECTING SAID GLASS PLATES BEING OF SUCH STIFFNESS AS TO MAINTAIN SAID PLATES IN UNIFORMLY SPACED POSITION DURING THE FILLING OF THE MOLD WITH SAID ESTERS BUT YIELDING UPON CONTRACTION OF THE MOLD CONTENTS DURING POLYMERIZATION, SAID INTERCONNECTING PORTION OF SAID STRIP BEING THE SOLE MEANS FOR SPACING SAID PLATES DURING FILLING OF THE MOLD.

Claim 3

A METHOD FOR CONSTRUCTING A MOLD FOR THE CASTING OF MASS POLYMER SHEETS FROM POLYMERIZABLE ESTERS OF A-CHOLOROACRYLIC ACID, WHICH COMPRISES TEMPORARILY SUPPORTING A PAIR OF SIMILARLY SHAPED GLASS PLATES IN SPACED PARALLEL FACE-TO-FACE RELATION WITH THEIR EXTERNAL EDGES SURFACES IN MUTUAL ALIGNMENT, APPLYING TO THE EDGES OF THE PLATES A STRIP OF CELLULOSIC MATERIAL HAVING ITS SURFACE COATED WITH AN ADHESIVE FILM-FORMING SOLUTION OF A PROTEIN IN A VOLATILE ORGANIC SOLVENT, SAID STRIP EXTENDING ALONG THE EDGES OF THE PLATES TO ENCLOSE THE SPACE BETWEEN THEM, EVAPORATING THE SOLVENT TO CAUSE SAID STRIP TO ADHERE TO THE PLATE EDGES AND TO FORM A LEAKPROOF JOINT THEREWITH, AND RELEASING THE PLATES FROM THE AFORESAID TEMPORARY SUPPORT, THE PORTION OF SAID STRIP INTERCONNECTING SAID GLASS PLATES BEING OF SUCH STIFFNESS AS TO MAINTAIN SAID PLATES IN UNIFORMLY SPACED RELATION DURING FILLING OF THE MOLD WITH SAID ESTERS BUT YIELDING UPON CONTRACTION OF THE MOLD CONTENTS DURING POLYMERIZATION, INTERCONNECTING PORTION OF THE STRIPS BEING THE SOLE MEANS FOR SPACING SAID PLATES DURING FILLING THE MOLD AFTER RELEASE OF THE PLATES FROM SAID TEMPORARY SUPPORT.

Claim 4

A METHOD FOR CONSTRUCTING A MOLD FOR THE CASTING OF MASS POLYMER SHEETS FROM POLYMERIZABLE ESTERS OF A-CHOLOROACRYLIC ACID, WHICH COMPRISES TEMPORARILY SUPPORTING A PAIR OF SIMILARLY SHAPED GLASS PLATES IN SPACED PARALLEL FACE-TO-FACE RELATION WITH THEIR EXTERNAL EDGES SURFACES IN MUTUAL ALIGNMENT, APPLYING TO THE EDGES OF THE PLATES A STRIP OF CELLULOSIC MATERIAL HAVING ITS SURFACE COATED WITH AN ADHESIVE FILM-FORMING SOLUTION OF A PROTEIN IN A VOLATILE ORGANIC SOLVENT, SAID STRIP EXTENDING ALONG THE EDGES OF THE PLATES TO ENCLOSE THE SPACE BETWEEN THEM, EVAPORATING THE SOLVENT TO CAUSE SAID STRIP TO ADHERE TO THE PLATE EDGES AND TO FORM A LEAKPROOF JOINT THEREWITH, AND RELEASING THE PLATES FROM THE AFORESAID TEMPORARY SUPPORT, THE PORTION OF SAID STRIP INTERCONNECTING SAID GLASS PLATES BEING OF SUCH STIFFNESS AS TO MAINTAIN SAID PLATES IN UNIFORMLY SPACED RELATION DURING FILLING OF THE MOLD WITH SAID ESTERS BUT YIELDING UPON CONTRACTION OF THE MOLD CONTENTS DURING POLYMERIZATION, INTERCONNECTING PORTION OF THE STRIPS BEING THE SOLE MEANS FOR SPACING SAID PLATES DURING FILLING THE MOLD AFTER RELEASE OF THE PLATES FROM SAID TEMPORARY SUPPORT.