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公开(公告)号：US20210347670A1
公开(公告)日：2021-11-11
申请号：US17313624
申请日：2021-05-06
Applicant: Schott AG
Inventor： Thomas Lenz , Andreas Langsdorf , Fabian Etzold , Christoph Gross , Ulrich Lange , Markus Ollig , Arne Riecke , Wolfgang Wallat
Abstract: A glass tube, such as a glass tube for the production of containers for storage of pharmaceutical compositions, facilitates production of pharmaceutical containers with high quality. The glass tube has a relative cross-sectional area deviation defined as QF max - QF min 1.5 m . QF max - QF min 1.5 m is less than k*x+t. QFmax is the highest cross-sectional area and QFmin is the lowest cross-sectional area of at least two cross-sections of the glass tube, the cross-sections being spaced apart from each other along a length of the glass tube, and k is 0.0023 m−1, t is less than 0.15 mm2/m and x is QF max + QF min 2 .
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Patent Agency Ranking
公开(公告)号：US20210403362A1
公开(公告)日：2021-12-30
申请号：US17358467
申请日：2021-06-25
Applicant: Schott AG
Inventor： André Witzmann , Volker Trinks , Thomas Lenz
Abstract: At least one glass tube has an azimuthal wall thickness deviation WTD of not more than 6.0%, the azimuthal wall thickness deviation being determined based on a lowest wall thickness value and a highest wall thickness value measured within a cross-section of the at least one glass tube, the azimuthal wall thickness deviation WTD being calculated according to the following formula: W T D = 100 - ( lowest wall thickness value highest wall thickness value * 100 ) % .
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公开(公告)号：US20250122113A1
公开(公告)日：2025-04-17
申请号：US19002098
申请日：2024-12-26
Applicant: Schott AG
Inventor： André Witzmann , Volker Trinks , Thomas Lenz
Abstract: A process for producing a glass tube includes: applying a glass melt onto an outer surface of a rotating conical mandrel by guiding the glass melt from a feed tank through an outlet, the glass melt forming a strand of molten glass that flows from the outlet onto the outer surface; forming a hollow glass melt body on the conical mandrel; drawing the hollow glass melt body from the conical mandrel in a predetermined direction toward a front end for forming a glass tube, the outer surface having a wetting zone where the strand of molten glass first contacts the conical mandrel, the wetting zone being at a vertical distance from the outlet and a vertical movement of the conical mandrel is monitored; reducing vertical movement of the conical mandrel; cooling the hollow glass melt body; and cutting the cooled glass melt body into glass tubes.
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公开(公告)号：US20240279101A1
公开(公告)日：2024-08-22
申请号：US18631723
申请日：2024-04-10
Applicant: Schott AG
Inventor： Thomas Lenz , Andreas Langsdorf , Fabian Etzold , Christoph Gross , Ulrich Lange , Markus Ollig , Arne Riecke , Wolfgang Wallat
CPC classification number: C03B17/04 , A61J1/065 , A61J1/1468 , C03C3/087 , C03C3/091
Abstract: A process for producing glass tubes includes: applying a glass melt onto an outer surface of a rotating conical mandrel by guiding the glass melt from a feed tank through an outlet; forming a hollow glass melt body on the conical mandrel; drawing the hollow glass melt body from the conical mandrel in a predetermined direction toward a front end for forming a glass tube, the outer surface having a wetting zone where the glass strand first contacts the conical mandrel, a spatial variation of the wetting zone of the applied glass melt being monitored by measuring a horizontal movement of an edge of the glass strand; reducing the spatial variation by adjusting one or more process parameters; cooling the hollow glass melt body; and cutting the cooled glass melt body into glass tubes.
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公开(公告)号：US11981593B2
公开(公告)日：2024-05-14
申请号：US17313624
申请日：2021-05-06
Applicant: Schott AG
Inventor： Thomas Lenz , Andreas Langsdorf , Fabian Etzold , Christoph Gross , Ulrich Lange , Markus Ollig , Arne Riecke , Wolfgang Wallat
CPC classification number: C03B17/04 , A61J1/065 , A61J1/1468 , C03C3/087 , C03C3/091
Abstract: A glass tube, such as a glass tube for the production of containers for storage of pharmaceutical compositions, facilitates production of pharmaceutical containers with high quality. The glass tube has a relative cross-sectional area deviation defined as
QF
max
-
QF
min
1.5
m
.
QF
max
-
QF
min
1.5
m
is less than k*x+t. QFmax is the highest cross-sectional area and QFmin is the lowest cross-sectional area of at least two cross-sections of the glass tube, the cross-sections being spaced apart from each other along a length of the glass tube, and k is 0.0023 m−1, t is less than 0.15 mm2/m and x is
QF
max
+
QF
min
2
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公开(公告)号：US12240777B2
公开(公告)日：2025-03-04
申请号：US17358467
申请日：2021-06-25
Applicant: Schott AG
Inventor： André Witzmann , Volker Trinks , Thomas Lenz
Abstract: At least one glass tube has an azimuthal wall thickness deviation WTD of not more than 6.0%, the azimuthal wall thickness deviation being determined based on a lowest wall thickness value and a highest wall thickness value measured within a cross-section of the at least one glass tube, the azimuthal wall thickness deviation WTD being calculated according to the following formula: W T D = 100 - ( lowest wall thickness value highest wall thickness value * 100 ) % .
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