Cold process lamination machine

Claim 1

APPARATUS FOR LAMINATING A PLASTIC SHEET ONTO A THIN PAPER SHEET BY COLD PROCESS PRESSURE ACTIVATION OF ADHESIVE COATING MATERIAL CARRIED ON A CONTACT FACE OF THE PLASTIC SHEET FOR ADHERENCE TO THE PAPER SHEET AND COMPRISING FRAMING STRUCTURE PROVIDING PARALLEL SPACED APART VERTICAL TRACKS HAVING CORRESPONDING LENGTHWISE GUIDEWAYS, A SEPARATE STATIONARY BEARING IN THE LOWER END JOF EACH GUIDEWAY, FIRST AND SECOND SUPERPOSED LAMINATING ROLLERS EXTENDING IN PARALLEL RELATION BETWEEN SAID TRACKS, FIRST MEANS IN EACH GUIDEWAY PROVIDING A PAIR OF ALIGNED SPACED APART BEARINGS CONJOINTLY MOUNTING ONE OF SAID ROLLERS TO ROTATE ABOUT ITS CENTRAL AXIS, SECOND MEANS IN EACH GUIDEWAY PROVIDING A PAIR OF ALIGNED SPACE APART BEARINGS CONJOINTLY MOUNTING THE OTHER OF SAID ROLLERS TO ROTATE ABOUT ITS CENTRAL AXIS, EACH ROLLER HAVING A BODY OF RESILIENTLY DEFORMABLE MATERIAL UNIFORMLY ARRANGED ABOUT ITS AXIS AND NORMALLY LPRESENTING A CYLINDRICAL EXTERIOR SURFACE HAVING A SURFACE HARDNESS CHARACTERISTIC SUCH THAT, WHEN EACH SAID ROLLER IS LOADED RADIALLY AGAINST A ROLLER OF SUBSTANTIALLY MATCHED CONFIGURATION AND SURFACE HARDNESS CHARACTERISTIC, EACH SAID ROLLER PRESENT A FLAT CONTACT FACE HAVING A WIDTH RELATIVE TO ROLLER DIAMETER DEFINING A RATIO IN THE RANGE OF 1/9 TO 1/8 AT AN AVERAGE PRESSURE OVER SAID FACE OF 20 P.S.I., RESILIENT MEANS ON SAID FRAMING STRUCTURE BIASING THE BEARINGS OF EACH GUIDEWAY TOGETHER TO HOLD THE NORMALLY CYLINDRICAL SURFACES OF SAID SUPERPOSED ROLLERS IN DEFORMED ENGAGEMENT AT A FORCE VALUE THAT PROVIDES MATCHED OPPOSED CONTACT FACES, EACH HAVING A WIDTH RELATIVE TO ROLLER DIAMETER DEFINING A RATIO THAT RANGES UP TO ABOUT 1/5, SAID CONTACT FACES HAVING A SHEET ENTRY LREGION ALONG ONE EDGE AND A SHEET EXIT REGION ALONG THE OPPOSITE EDGE, SAID FRAMING STRUCTURE HAVING ENTRY AND EXIT SHELVES IN FLANKING RELATION TO SAUD SUPERPOSED ROLLERS TO SUPPORT AND LOCATE SHEET MATERIAL SUBSTANTIALLY AT THE ELEVATION OF AND IN THE PLANE OF SAID CONTACT FACES, AND MEANS ON SAID FRAMING STRUCTURE FOR DRIVING ONE OF SAID ROLLERS AT A SURFACE SPEED RELATED TO CONTACT FACE WIDTH TO PROVIDE A TRANSIT TIME THROUGH SAID FACES OF AT LEAST 1/8 OF A SECOND.