Method of making heat exchange structure

Claim 1

A method of forming a structure particularly adapted for use as a heat exchange structure providing a plurality of heat exchange passageways, said structure being a longitudinal axis, a lateral axis and a vertical axis, said structure comprising: a. a plurality of thin film heat sealable plastic sheets aligned longitudinally and laterally with one another and spaced vertically from one another, b. alternate pairs of said sheets being bonded one to another along a plurality of first longitudinally extending bond lines, positioned at predetermined laterally spaced first locations across said sheets, c. intermediate pairs of said sheets being bonded one to another along a plurality of second longitudinally extending bond lines positioned at laterally spaced second locations across said sheets, said second bond lines being positioned transversely intermediate of said first locations, each of said intermediate pairs of sheets being made up of adjacent sheets of alternate pairs of said sheets, said method comprising: a. placing a plurality of thin film heat sealable plastic sheets, which are to form the heat exchange structure, adjacent one another in both longitudinal and transverse alignment, and in vertically stacked relationship, b. placing a first set of bonding bars between alternate pairs of said sheets at first locations where the first longitudinally extending bond lines of said alternate sheets are to be located, c. placing a second set of longitudinally extending bonding bars between intermediate pairs of said sheets being made up of adjacent sheets of adjacent alternate pair of sheets, d. causing said bars to be in pressure contact with said sheets and heating said bars to a temperature sufficiently high to cause bonding of said sheets to one another at the locations of the first and second longitudinally extending bond lines, and e. removing the bars from the sheets.

Claim 2

A method of forming a structure particularly adapted for use as a heat exchange structure providing a plurality of heat exchange passageways, said structure being a longitudinal axis, a lateral axis and a vertical axis, said structure comprising: a. a plurality of thin film heat sealable plastic sheets aligned longitudinally and laterally with one another and spaced vertically from one another, b. alternate pairs of said sheets being bonded one to another along a plurality of first longitudinally extending bond lines, positioned at predetermined laterally spaced first locations across said sheets, c. intermediate pairs of said sheets being bonded one to another along a plurality of second longitudinally extending bond lines positioned at laterally spaced second locations across said sheets, said second bond lines being positioned transversely intermediate of said first locations, each of said intermediate pairs of sheets being made up of adjacent sheets of alternate pairs of said sheets, said method comprising: a. placing a plurality of thin film heat sealable plastic sheets, which are to form the heat exchange structure, adjacent one another in both longitudinal and transverse alignment, and in vertically stacked relationship, b. placing a first set of bonding bars between alternate pairs of said sheets at first locations where the first longitudinally extending bond lines of said alternate sheets are to be located, c. placing a second set of longitudinally extending bonding bars between intermediate pairs of said sheets being made up of adjacent sheets of adjacent alternate pair of sheets, d. causing said bars to be in pressure contact with said sheets and heating said bars to a temperature sufficiently high to cause bonding of said sheets to one another at the locations of the first and second longitudinally extending bond lines, and e. removing the bars from the sheets.

Claim 8

A method of forming a structure particularly adapted for use as a heat exchange structure providing a plurality of heat exchange passageways, said structure having a longitudinal axis, a lateral axis and a vertical axis, said structure comprising: a. a plurality of thin film plastic heat sealable sheets aligned longitudinally and laterally with one another and spaced vertically from one another, b. alternate pairs of said sheets being bonded one to another along a plurality of first longitudinally extending bond lines, positioned at predetermined laterally spaced first locations across said sheets, c. intermediate pairs of said sheets being bonded one to another along a plurality of second longitudinally extending bond lines positioned at laterally spaced second locations across said sheets, said second bond lines being positioned transversely intermediate of said first locations, each of said intermediate pairs of sheets being made up of adjacent sheets of adjacent alternate pairs of said sheets, said method comprising: a. placing a plurality of thin film heat sealable plastic sheets, which are to form the heat exchange structure, adjacent one another in both longitudinal and transverse alignment, and in vertically stacked relationship, b. placing a first set of longitudinally extending bonding bars between first and second sheets at a first set of laterally spaced, longitudinally extending first locations corresponding to locations on said sheets where bond are to be made between said second and a third sheet, c. placing a second set of longitudinally extending bonding bars between said second and third sheets at longitudinally extending, laterally spaced second locations positioned intermittently with respect to said first locations of said first set of bars, d. placing additional sets of bonding bars between additional pairs of said sheets in a pattern similar to that of the first and second sets of bars, e. causing said bars to be in pressure contact with said sheets and heating said bars to a temperature sufficiently high to cause bonding of said sheets one to another at the locations of the first and second longitudinally extending bond lines, and f. removing the bars from the sheets.

Claim 9

A method of forming a structure particularly adapted for use as a heat exchange structure providing a plurality of heat exchange passageways, said structure having a longitudinal axis, a lateral axis and a vertical axis, said structure comprising: a. a plurality of thin film plastic heat sealable sheets aligned longitudinally and laterally with one another and spaced vertically from one another, b. alternate pairs of said sheets being bonded one to another along a plurality of first longitudinally extending bond lines, positioned at predetermined laterally spaced first locations across said sheets, c. intermediate pairs of said sheets being bonded one to another along a plurality of second longitudinally extending bond lines positioned at laterally spaced second locations across said sheets, said second bond lines being positioned transversely intermediate of said first locations, each of said intermediate pairs of sheets being made up of adjacent sheets of adjacent alternate pairs of said sheets, said method comprising: a. placing a plurality of thin film heat sealable plastic sheets, which are to form the heat exchange structure, adjacent one another in both longitudinal and transverse alignment, and in vertically stacked relationship, b. placing a first set of longitudinally extending bonding bars between first and second sheets at a first set of laterally spaced, longitudinally extending first locations corresponding to locations on said sheets where bond are to be made between said second and a third sheet, c. placing a second set of longitudinally extending bonding bars between said second and third sheets at longitudinally extending, laterally spaced second locations positioned intermittently with respect to said first locations of said first set of bars, d. placing additional sets of bonding bars between additional pairs of said sheets in a pattern similar to that of the first and second sets of bars, e. causing said bars to be in pressure contact with said sheets and heating said bars to a temperature sufficiently high to cause bonding of said sheets one to another at the locations of the first and second longitudinally extending bond lines, and f. removing the bars from the sheets.

Claim 10

A method of forming a structure particularly adapted for use as a heat exchange structure providing a plurality of heat exchange passageways, said structure having a longitudinal axis, a lateral axis and a vertical axis, said structure comprising: a. a plurality of thin film heat sealable plastic sheets aligned longitudinally and laterally with one another and spaced vertically from one another, b. alternate pairs of said sheets being bonded one to another along a plurality of first longitudinally extending bond lines, positioned at predetermined laterally spaced first locations across said sheets, c. intermediate pairs of said sheets being bonded one to another along a plurality of second longitudinally extending bond lines positioned at laterally spaced second locations across said sheets, said second bond lines being positioned transversely intermediate of said first locations, each of said intermediate pairs of sheets being made up of adjacent sheets of adjacent alternate pairs of said sheets, said method comprising: a. placing a plurality of thin film heat sealable plastic sheets, which are to form the heat exchange structure, adjacent one another in both longitudinal and transverse alignment, and in vertically stacked relationship, b. placing a first set of longitudinally extending bonding bars between first and second sheets at a first set of laterally spaced, longitudinally extending first locations corresponding to locations on said sheets where bonds are to be made between said second sheet and a third sheet, c. placing a second set of longitudinally extending bonding bars between said second and third sheets at longitudinally extending, laterally spaced second locations positioned intermittently with respect to said first locations of said first set of bars, d. placing longitudinally extending separating strips between said third sheet and a fourth sheet at longitudinally extending, laterally spaced third locations vertically aligned with the first locations of the first set of bars, e. placing a second set of bonding strips between said fourth sheet and a fifth sheet at longitudinally extending, laterally spaced fourth locations positioned vertically above the second locations of the second set of bars, f. placing additional sets of bars and separating strips between additional sheets in substantially the same pattern as described in paragraphs b, c, d, and e immediately above, with respect to said first and second sets of bars and said first and second sets of separating strips, g. causing said bars to be in pressure contact with said sheets and heating said bars to a temperature sufficiently high to cause bonding of said sheets to one another at the locations of the first and second longitudinally extending bond lines, and h. removing the bars from the sheets.

Claim 11

A method of forming a structure particularly adapted for use as a heat exchange structure providing a plurality of heat exchange passageways, said structure having a longitudinal axis, a lateral axis and a vertical axis, said structure comprising: a. a plurality of thin film heat sealable plastic sheets aligned longitudinally and laterally with one another and spaced vertically from one another, b. alternate pairs of said sheets being bonded one to another along a plurality of first longitudinally extending bond lines, positioned at predetermined laterally spaced first locations across said sheets, c. intermediate pairs of said sheets being bonded one to another along a plurality of second longitudinally extending bond lines positioned at laterally spaced second locations across said sheets, said second bond lines being positioned transversely intermediate of said first locations, each of said intermediate pairs of sheets being made up of adjacent sheets of adjacent alternate pairs of said sheets, said method comprising: a. placing a plurality of thin film heat sealable plastic sheets, which are to form the heat exchange structure, adjacent one another in both longitudinal and transverse alignment, and in vertically stacked relationship, b. placing a first set of longitudinally extending bonding bars between first and second sheets at a first set of laterally spaced, longitudinally extending first locations corresponding to locations on said sheets where bonds are to be made between said second sheet and a third sheet, c. placing a second set of longitudinally extending bonding bars between said second and third sheets at longitudinally extending, laterally spaced second locations positioned intermittently with respect to said first locations of said first set of bars, d. placing longitudinally extending separating strips between said third sheet and a fourth sheet at longitudinally extending, laterally spaced third locations vertically aligned with the first locations of the first set of bars, e. placing a second set of bonding strips between said fourth sheet and a fifth sheet at longitudinally extending, laterally spaced fourth locations positioned vertically above the second locations of the second set of bars, f. placing additional sets of bars and separating strips between additional sheets in substantially the same pattern as described in paragraphs b, c, d, and e immediately above, with respect to said first and second sets of bars and said first and second sets of separating strips, g. causing said bars to be in pressure contact with said sheets and heating said bars to a temperature sufficiently high to cause bonding of said sheets to one another at the locations of the first and second longitudinally extending bond lines, and h. removing the bars from the sheets.