Process for substantially retarding dissolution of calcium carbonate in a papermaking system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
D21H-017/64
D21H-017/69
출원번호
US-0462170
(2000-01-03)
우선권정보
FI-19980478 (1998-03-03)
국제출원번호
PCT/FI98/00558
(1998-06-25)
국제공개번호
WO99/35333
(1999-07-15)
발명자
/ 주소
Laurila-Lumme, Auli
Pakarinen, Heikki
Leino, Hannu Juhani
출원인 / 주소
AGA Aktiebolag, UPM-Kymmene Corp.
대리인 / 주소
Browdy and Neimark, P.L.L.C.
인용정보
피인용 횟수 :
10인용 특허 :
10
초록▼
The invention relates to papermaking processes wherein calcium carbonate is included in a pulp suspension. The dissolution of the calcium carbonate in the papermaking system is prevented or substantially retarded by the introduction of carbon dioxide to said pulp suspension in connection with subjec
The invention relates to papermaking processes wherein calcium carbonate is included in a pulp suspension. The dissolution of the calcium carbonate in the papermaking system is prevented or substantially retarded by the introduction of carbon dioxide to said pulp suspension in connection with subjecting said calcium carbonate in said papermaking system to pH conditions of about 8 or lower. The invention also provides processes for the production of paper or board in papermaking systems wherein solid calcium carbonate is present as a filler and/or pigment.
대표청구항▼
The invention relates to papermaking processes wherein calcium carbonate is included in a pulp suspension. The dissolution of the calcium carbonate in the papermaking system is prevented or substantially retarded by the introduction of carbon dioxide to said pulp suspension in connection with subjec
The invention relates to papermaking processes wherein calcium carbonate is included in a pulp suspension. The dissolution of the calcium carbonate in the papermaking system is prevented or substantially retarded by the introduction of carbon dioxide to said pulp suspension in connection with subjecting said calcium carbonate in said papermaking system to pH conditions of about 8 or lower. The invention also provides processes for the production of paper or board in papermaking systems wherein solid calcium carbonate is present as a filler and/or pigment. ongue of the first pincer member on expansion of the stent and the first and second arms of the second pincer member grips the first pincer member of the stent. 12. The stent of claim 1 wherein the lockable cell includes a serpentine shaped proximal end, a serpentine shaped distal end, a first sidewall extending between the serpentine shaped proximal end and the serpentine shaped distal end, and a second sidewall extending between the serpentine shaped proximal end and the serpentine shaped distal end, the tongue and the pincer member disposed between the first sidewall and the second sidewall. 13. The stent of claim 1 wherein the first locking member is an interlocking member and the second locking member is an interlocking member, the first and second interlocking members constructed and arranged to interlock with one another upon expansion of the stent. 14. A stent having a proximal end and a distal end, the stent comprising a plurality of interconnected cells, at least one of the interconnected cells being a lockable cell, the lockable cell including; a first locking member and a second locking member disposed opposite the first member, the first and second locking members movable between a first position in which they do not lock with one another to a position in which they lock with one another; the first locking member is a pincer member comprising a first arm and a second arm and the second locking member is a tongue, the first and second arms disposed in a first position in which they do not grip the tongue and movable between the first position and a second position in which they grip the tongue, the tongue including a narrow neck portion and a wider head portion. 15. A stent comprised of a plurality of interconnected bands, at least one of the interconnected bands having a first locking member extending therefrom toward an adjacent band, a second locking member extending from an adjacent band, the first and second locking members movable from a first position in which they do not lock with one another to a second position in which they lock with one another; wherein the first locking member is a pincer member comprising a first arm and a second arm, and the second locking member is a tongue, the first arm and the second arm moving toward one another to grip the tongue on expansion of the stent. 16. The stent of claim 15 wherein the first locking member is a pincer member having a first arm and a second arm and the second locking member is a tongue extending from the adjacent band, the first and second arms gripping the tongue in the second position. 17. The stent of claim 16 expandable from an unexpanded state to an expanded state, the first and second arms in the first position when the stent is in the unexpanded state, the first and second arms in the second position when the stent is in the expanded state. 18. The stent of claim 17 wherein each band is serpentine having alternating peaks and troughs, the peaks extending in a distal direction, the troughs extending in a proximal direction. 19. The stent of claim 18 wherein the pincer member extends from a peak on a band and the tongue extends from a trough on an adjacent band. 20. The stent of claim 16, at least one of the interconnected bands having a plurality of pincer members extending therefrom toward an adjacent band, each pincer member having a first arm and a second arm, the adjacent band having a plurality of tongues extending therefrom, the first and second arms of each pincer member movable between a first position in which they are not in contact with one of the tongues and a second position in which they grip one of the tongues. 21. The stent of claim 16, wherein a plurality of bands each have at least one pincer member extending therefrom toward a tongue extending from an adjacent band. 22. The stent of claim 15 wherein the bands extend circumferentially. 23. The stent of claim 15 wherein the bands extend longitudinally. 24. T he stent of claim 15 wherein the bands extend helically. 25. The stent of claim 16 the adjacent band comprising a second pincer member which comprises a first arm and a second arm, the tongue disposed between the first and second arms of the second pincer member, the first pincer member situated opposite the second pincer member, wherein the first and second arms of the second pincer member grip the tongue of the first pincer member on expansion of the stent and the first and second arms of the second pincer member grips the first pincer member of the stent. 26. The stent of claim 15 wherein the first locking member is a first interlocking member and the second locking member is a second interlocking member, the first and second interlocking members constructed and arranged to interlock with one another upon expansion of the stent. 27. A stent comprised of a plurality of interconnected bands, at least one of the interconnected bands having a first locking member extending therefrom toward an adjacent band, a second locking member extending from an adjacent band, the first and second locking members movable from a first position in which they do not lock with one another to a second position in which they lock with one another, the first locking member is a pincer member having a first arm and a second arm and the second locking member is a tongue extending from the adjacent band, the first and second arms gripping the tongue in the second position, the tongue including a narrow neck portion and a wider head portion. 28. A stent having a proximal end and a distal end, the stent comprising a plurality of interconnected cells, at least one of the interconnected cells being a lockable cell, the lockable cell including a first locking member and a second locking member, the second locking member constructed and arranged to lockingly engage the first locking member on expansion of the stent, wherein the first locking member is a pincer member comprising a first arm and a second arm, and the second locking member is a tongue, the first arm and the second arm moving toward one another to grip the tongue on expansion of the stent. 29. The stent of claim 28 comprising a plurality of lockable cells. 30. The stent of claim 29 comprising rows of lockable cells and at least one row of non-lockable cells. 31. The stent of claim 30 comprising a plurality of rows of non-lockable cells, wherein the rows of lockable cells alternate with the rows of non-lockable cells along the length of the stent. 32. The stent of claim 30 where at least one row of lockable cells is provided at one of the distal end of the stent and the proximal end of the stent. 33. The stent of claim 30 wherein at least one row of lockable cells is provided between the proximal and distal ends of the stent. 34. The stent of claim 28 wherein the number of lockable cells disposed about the periphery of the stent increases from one end of the stent to the other. 35. The stent of claim 28 wherein the first locking member clamps to the second locking member on expansion of the stent. 36. The stent of claim 28 wherein the first locking member and the second locking member interlock with one another. 37. An unexpanded stent comprised of a plurality of connected bands at least one of the bands having a first locking member extending therefrom toward an adjacent band, the adjacent band having a second locking member, the second locking member lockingly engaging the first locking member when the stent is in an expanded state, wherein the first locking member is a pincer member comprising a first arm and a second arm, and the second locking member is a tongue, the first arm and the second arm moving toward one another to grip the tongue on expansion of the stent. 38. The stent of claim 37 wherein the first locking member is a first interlocking member and the second locking member is a second interlocking member, the second interlocking member constructed and a
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이 특허에 인용된 특허 (10)
Passaretti June D. (Liberty Corner NJ), Acid-stabilized calcium carbonate, process for its production and method for its use in the manufacture of acidic paper.
Passaretti June D. (Liberty Corner NJ), Acid-stabilized calcium carbonate, process for its production and method for its use in the manufacture of acidic paper.
Klungness John H. (Madison WI) Caulfield Daniel F. (Madison WI) Sachs Irving B. (Madison WI) Sykes Marguerite S. (Madison WI) Tan Freya (Madison WI) Shilts Richard W. (Stoughton WI), Method for fiber loading a chemical compound.
De Witt James A. (Burnaby CAX) Eadie Donald T. (North Vancouver CAX) Hayes Gordon R. (Powell River CAX) Monahan Robert E. (Powell River CAX), Neutral papermaking.
Andersson Kjell R. (DomsjSEX) stensson Per O. L. (DomsjSEX) Kuni Stefan O. (Kotka FIX), Paper manufacturing process, and papers obtainable by means of that process.
Matthew M. C. (Morris Plains NJ) Patnaik Sanjay (Westwood NJ) Hart Paul (Surfside Beach SC) Amidon Thomas (Highland Mills NY), Process for enhanced deposition and retention of particulate filler on papermaking fibers.
Brotto Jefferson Luis,BRX ; Madeiros Douglas Barbosa,BRX ; Valladares Alexandre Sayao,BRX ; Slocumb John Allen, Recycled paper production process which incorporates carbon dioxide.
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