公开(公告)号：US20210347670A1

公开(公告)日：2021-11-11

申请号：US17313624

申请日：2021-05-06

申请人： Schott AG

发明人： Thomas Lenz ,  Andreas Langsdorf ,  Fabian Etzold ,  Christoph Gross ,  Ulrich Lange ,  Markus Ollig ,  Arne Riecke ,  Wolfgang Wallat

IPC分类号： C03B17/04 ,  A61J1/06 ,  A61J1/14 ,  C03C3/091 ,  C03C3/087

摘要： 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 .

公开(公告)号：US20240279101A1

公开(公告)日：2024-08-22

申请号：US18631723

申请日：2024-04-10

申请人： Schott AG

发明人： Thomas Lenz ,  Andreas Langsdorf ,  Fabian Etzold ,  Christoph Gross ,  Ulrich Lange ,  Markus Ollig ,  Arne Riecke ,  Wolfgang Wallat

IPC分类号： C03B17/04 ,  A61J1/06 ,  A61J1/14 ,  C03C3/087 ,  C03C3/091

CPC分类号： C03B17/04 ,  A61J1/065 ,  A61J1/1468 ,  C03C3/087 ,  C03C3/091

摘要： 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.

公开(公告)号：US11981593B2

公开(公告)日：2024-05-14

申请号：US17313624

申请日：2021-05-06

申请人： Schott AG

发明人： Thomas Lenz ,  Andreas Langsdorf ,  Fabian Etzold ,  Christoph Gross ,  Ulrich Lange ,  Markus Ollig ,  Arne Riecke ,  Wolfgang Wallat

IPC分类号： C03B17/04 ,  A61J1/06 ,  A61J1/14 ,  C03C3/087 ,  C03C3/091

CPC分类号： C03B17/04 ,  A61J1/065 ,  A61J1/1468 ,  C03C3/087 ,  C03C3/091

摘要： 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

.