Claims
- 1. A system in a papermaking machine applying a compressive force to a web of paper comprising:
- a rotating press roll;
- compliant means for transporting the web of paper around a portion of the press roll;
- means for applying a film of lubricant to the compliant means for transporting; and
- means for compressing the compliant means for transporting against the press roll, the means for compressing having a shoe to maintain the film of lubricant along the interface of the means for compressing and the compliant means for transporting, the shoe including:
- an inrunning surface extended approximately 1.degree.-5.degree. from a line substantially tangent to a load arc, formed by the shoe against the press roll, through the point where the load arc intersects an inrunning nip point created by the shoe and press roll;
- an outrunning surface extended approximately 1.degree.-5.degree. from a line substantially tangent to the load arc, formed by the shoe against the press roll, through the point where the load arc intersects an outrunning nip point created by the shoe and press roll;
- means for controllably distributing the release of the compressive force on side edge portions of the compliant transport system; and
- means for advancing the shoe toward the rotating press roll.
- 2. The invention of claim 1, wherein the compliant means for transporting the web of paper around a portion of the press roll comprises:
- a plurality of fabric loops between which the web of paper is transported and into which moisture from the web is transferred; and
- means for transferring the compressive force to the plurality of fabric loops.
- 3. The invention of claim 1, wherein the compliant means for transporting the web of paper around a portion of the press roll comprises:
- a fabric loop into which moisture from the web of paper is transferred; and
- means for transferring the compressive force to the fabric loop.
- 4. The invention of claim 2 or 3, wherein the means for transferring the compressive force comprises a belt of impermeable material to maintain a film of lubricant between the means for compressing and the belt of impermeable material.
- 5. The invention of claim 1, wherein the means for applying a film of lubricant to the compliant means for transporting comprises:
- an open reservoir of lubricant;
- means for raising the lubricant to a level sufficient to contact the entire width of the compliant means for transporting;
- means for retaining lubricant in the reservoir during contact of the compliant means for transporting with the lubricant;
- means for catching excess lubricant carried by the compliant means for transporting; and
- means for circulating caught lubricant to the reservoir.
- 6. The invention of claim 1, wherein said point associated with the inrunning surface is located where the compliant means for transporting simultaneously contacts the shoe and roll; and
- said output associated with the outrunning surface is located where the compliant means for transportion ceases to simultaneously contact the shoe and roll.
- 7. The invention of claim 1, wherein said point associated with the inrunning surface is located where the compliant means for transporting is compressed to a predetermined maximum against the roll by the shoe; and
- said output associated with the outrunning surface is located where the compliant means for transporting ceases to be compressed to a predetermined maximum against the roll by the shoe.
- 8. The invention of claim 1, wherein said point associated with the inrunning surface is located where a vertex is formed by the shoe and the compliant means for transporting; and
- said output associated with the outrunning surface is located where a vertex is formed by the shoe and the compliant means for transporting.
- 9. The invention of claim 1, 6, 7, or 8, wherein the inrunning surface is extended approximately 2-4 inches at said angle of approximately 1.5.degree. from the line substantially tangent to the load arc.
- 10. The invention of claim 1, 6, 7, or 8, wherein the means for controllably distributing the release of the compressive force on side edge portions of the compliant transport system comprises edge surfaces inclined away from a line substantially parallel to the rotational axes of the press roll.
Parent Case Info
This is a Division of application Ser. No. 267,397, filed May 26, 1981.
US Referenced Citations (6)
Foreign Referenced Citations (1)
Number |
Date |
Country |
79919 |
Nov 1971 |
DDX |
Divisions (1)
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Number |
Date |
Country |
Parent |
267397 |
May 1981 |
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