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1. 发明授权

US4909819A Method for bending glass sheets 失效
标题翻译：玻璃板弯曲方法
公开(公告)号：US4909819A
公开(公告)日：1990-03-20
申请号：US367954
申请日：1989-06-19
申请人： Harold A. McMaster , Norman C. Nitschke , Dexter H. McMaster , Ronald A. McMaster , Thomas E. Feehan
发明人： Harold A. McMaster , Norman C. Nitschke , Dexter H. McMaster , Ronald A. McMaster , Thomas E. Feehan
IPC分类号： C03B23/025 , C03B23/03 , C03B23/033 , C03B27/044
CPC分类号： C03B23/0258 , C03B23/0256 , C03B23/0305 , C03B23/0307 , C03B23/033 , C03B27/0442
摘要： A method for bending glass sheets is disclosed in which a heated glass sheet (12) is introduced between spaced upper and lower bending platens (16,18). Heat source (19), integral with platen (18), is operable for applying heat in close proximity to the glass sheet (12) between the platens (16,18) to maintain an optimal bending temperature and the glass sheet (12) is bent such that a specific geometric orientation of the bend on the glass sheet (12) is controllable and repeatedly reproducible during a production operation.
摘要翻译：公开了一种用于弯曲玻璃板的方法，其中将加热的玻璃板（12）引入间隔开的上部和下部弯曲台（16,18）之间。与压板（18）成一体的热源（19）可操作用于在压板（16,18）之间靠近玻璃板（12）施加热量以保持最佳弯曲温度，并且玻璃板（12）为弯曲，使得玻璃板（12）上的弯曲部的特定几何取向在生产操作期间是可控的并且可重复地重现。

2. 发明授权

US4883527A Glass sheet bending and tempering apparatus 失效
标题翻译：玻璃板弯曲回火设备
公开(公告)号：US4883527A
公开(公告)日：1989-11-28
申请号：US249718
申请日：1988-09-27
申请人： Harold A. McMaster , Norman C. Nitschke , Dexter H. McMaster , Ronald A. McMaster
发明人： Harold A. McMaster , Norman C. Nitschke , Dexter H. McMaster , Ronald A. McMaster
IPC分类号： C03B23/025 , C03B23/03 , C03B23/033 , C03B27/044
CPC分类号： C03B23/0305 , C03B23/0256 , C03B23/033 , C03B27/0447
摘要： A glass bending and tempering apparatus (10) is disclosed as including a first platen (14) for receiving a heated glass sheet (12) to be bent. The first platen (14) is deformable and includes an actuator (16) for deforming platen (14) from a planar shape to a bent shape. A second platen (22) is mounted above lower platen (14) for bending and quenching glass sheet (12) therebetween the platens. A template (24) is located on the other side of the second platen (22) away from glass sheet (12). Second platen (22) is pressed against template (24) as first platen (14) is deformed from the planar shape to the bent shape to bend the heated glass sheet thereagainst second platen (22), the second platen (22) conforming to template (24). Quenching gas is supplied by both platens (14,22) through quench openings (18) that move with the platens (14,22) to temper the bent glass sheet between the platens.
摘要翻译：公开了一种玻璃弯曲回火设备（10），包括用于接收待弯曲的加热玻璃板（12）的第一台板（14）。第一压板（14）是可变形的并且包括用于使压板（14）从平面形状变形成弯曲形状的致动器（16）。第二压板（22）安装在下压板（14）的上方，用于在压板之间弯曲和淬火玻璃板（12）。模板（24）位于第二压板（22）的远离玻璃板（12）的另一侧。当第一压板（14）从平面形状变形到弯曲形状时，第二压板（22）被压靠模板（24），以将加热的玻璃板弯曲到第二压板（22）上，第二压板（22）符合模板（24）。淬火气体由两个压板（14,22）通过与压板（14,22）一起移动的淬火开口（18）供应以调节压板之间的弯曲玻璃板。

3. 发明授权

US4822398A Glass bending and tempering apparatus 失效
标题翻译：玻璃弯曲回火设备
公开(公告)号：US4822398A
公开(公告)日：1989-04-18
申请号：US83675
申请日：1987-08-07
申请人： Harold A. McMaster , Norman C. Nitschke , Dexter H. McMaster , Ronald A. McMaster
发明人： Harold A. McMaster , Norman C. Nitschke , Dexter H. McMaster , Ronald A. McMaster
IPC分类号： C03B23/03 , C03B20060101 , C03B23/023 , C03B23/025 , C03B23/033 , C03B27/04 , C03B27/044 , C03B35/18
CPC分类号： C03B23/0305 , C03B23/0254 , C03B23/0256 , C03B23/0302 , C03B23/033 , C03B27/0404 , C03B27/0413 , C03B27/0447
摘要： A glass bending and tempering apparatus (20) is disclosed as including a pair of opposed bending platens (24) for receiving a heated glass sheet (22) to be bent therebetween. At least one of the bending platens (24) is deformable and includes an actuator (32) for deforming the platens from a planar shape to a bent shape to bend the heated glass sheet. Said one platen (24) includes quench openings (42) that move with said platen during the deformation of the platen and subsequently supply quenching gas to temper the bent glass sheet (22).
摘要翻译：公开了一种玻璃弯曲和回火设备（20），包括一对相对的弯曲压板（24），用于容纳在其间弯曲的加热的玻璃板（22）。弯曲压板（24）中的至少一个是可变形的并且包括用于使压板从平面形状变形成弯曲形状以使加热的玻璃板弯曲的致动器（32）。所述一个压板（24）包括淬火开口（42），其在压板变形期间与所述压板一起移动，并随后供应淬火气体以回火弯曲的玻璃板（22）。

4. 发明授权

US4437872A Apparatus for bending and tempering glass sheets 失效
标题翻译：用于弯曲和回火玻璃板的设备
公开(公告)号：US4437872A
公开(公告)日：1984-03-20
申请号：US268535
申请日：1981-05-29
申请人： Harold A. McMaster , Norman C. Nitschke , John S. Nitschke
发明人： Harold A. McMaster , Norman C. Nitschke , John S. Nitschke
IPC分类号： C03B23/025 , C03B23/03 , C03B23/035 , C03B27/048 , C03B29/08 , C03B35/14 , C03B35/16 , C03B35/20 , C03B35/24 , C03B23/023
CPC分类号： C03B23/0357 , C03B23/0252 , C03B23/03 , C03B27/0417 , C03B27/048 , C03B29/08 , C03B35/145 , C03B35/164 , C03B35/202 , C03B35/24 , C03B40/005 , C03B2225/02
摘要： Sheet glass is heated during conveyance within a furnace housing having a fixed roof and vertically movable side doors that define side slots through which ends of conveyor rolls project outwardly to be supported and frictionally driven by continuous drive loops slidably driven over external support surfaces that extend alongside the side slots. A vacuum holder of the apparatus is positioned within the furnace housing above the conveyor and has a downwardly facing surface with spaced openings in which a vacuum is drawn to receive a glass sheet from the conveyor and support the sheet above the conveyor. The holder surface is disclosed as being both planar and curved and as having a porous cover of ceramic fibers so as to distribute the vacuum and prevent marring of the glass as it is supported. A greater vacuum is drawn to initially support the glass and a lesser vacuum is subsequently drawn to prevent glass deformation at the spaced openings. Vertically movable auxiliary lifters positioned between the rolls or vertical movement of the vacuum holder facilitates glass pickup. Sensing of the glass position along the conveyor and operation of a locator cooperatively provide accurate positioning of the glass on the holder surface without requiring the conveyor to be stopped prior to the holder operation. A carrier mold ring moves under the supported glass and the vacuum is then terminated so the glass drops onto the ring and bends under the bias of gravity in a manner that allows thin glass to be accurately bent. Subsequently the mold ring is moved from the furnace to a quench unit between upper and lower blastheads that temper the bent glass. Increased air is then supplied to the lower blasthead relative to the upper blasthead to lift the glass sheet off the ring and allow return of the ring to the furnace.
摘要翻译：平板玻璃在具有固定屋顶和可垂直移动的侧门的炉壳中被输送期间被加热，所述炉壳限定侧槽，输送辊的端部通过该侧槽向外突出以被支撑和摩擦地驱动，所述连续驱动环可滑动地驱动在外侧支撑表面上，侧槽。设备的真空保持器位于输送机上方的炉壳体内，并且具有向下的表面，其具有间隔开的开口，在该开口中抽真空以从输送机接收玻璃板并将片材支撑在输送机上方。公开了保持器表面是平面的和弯曲的，并且具有陶瓷纤维的多孔覆盖物，以便分布真空并防止玻璃被支撑时的损坏。拉伸更大的真空以最初支撑玻璃，随后抽取较小的真空以防止间隔开的开口处的玻璃变形。位于辊之间的垂直移动的辅助升降机或真空支架的垂直运动有利于玻璃拾取。传感器沿传送器的位置传感器和定位器的操作协调地提供玻璃在保持器表面上的精确定位，而不需要在保持器操作之前停止输送机。载体模具环在支撑的玻璃下移动，然后终止真空，因此玻璃落在环上并且在重力偏压下弯曲，从而允许薄玻璃被精确地弯曲。随后，模具环从炉子移动到上下旋转头之间的淬火单元，其使弯曲的玻璃变形。然后，相对于上部鼓风头将增加的空气供应到下部鼓风头，以将玻璃板从环上提起并允许将环返回到炉中。

5. 发明授权

US3930831A Furnace for heat treating glass sheet material 失效
标题翻译：热处理玻璃板材料
公开(公告)号：US3930831A
公开(公告)日：1976-01-06
申请号：US542339
申请日：1975-01-20
申请人： Harold A. McMaster , Norman C. Nitschke
发明人： Harold A. McMaster , Norman C. Nitschke
IPC分类号： C03B29/02 , C03B29/04
CPC分类号： C03B29/025
摘要： A furnace for heat treating glass sheet material including a circular enclosure having top, bottom and side walls of refractory material. Inlet and outlet openings are formed in the side walls. The side walls have an outer insulating layer and an inner layer of material having a low coefficient of thermal expansion, the inner layer having spaced end portions projecting beyond the outer layers and the periphery of the side walls to define said inlet and outlet openings. Each opening is controlled by doors, and each door includes an elongated support bar with a plurality of blocks of refractory material supported on the bar in end-to-end relationship. The blocks are adjustably secured to the bar to accommodate irregularities in the openings.

6. 发明授权

US4282026A Apparatus for bending and tempering glass 失效
标题翻译：用于弯曲和回火玻璃的设备
公开(公告)号：US4282026A
公开(公告)日：1981-08-04
申请号：US118822
申请日：1980-02-05
申请人： Harold A. McMaster , Norman C. Nitschke , John S. Nitschke
发明人： Harold A. McMaster , Norman C. Nitschke , John S. Nitschke
IPC分类号： C03B23/02 , C03B23/025 , C03B23/03 , C03B23/035 , C03B27/048 , C03B29/08 , C03B35/14 , C03B35/16 , C03B35/20 , C03B35/24
CPC分类号： C03B23/0357 , C03B23/02 , C03B23/0252 , C03B23/03 , C03B27/0417 , C03B27/048 , C03B29/08 , C03B35/145 , C03B35/164 , C03B35/202 , C03B35/24 , C03B40/005 , C03B2225/02
摘要： Sheet glass is heated during conveyance on a conveyor within a furnace. A vacuum holder is positioned within the furnace housing above the conveyor and has a downwardly facing surface with spaced openings in which a vacuum is drawn to receive a glass sheet from the conveyor and support the sheet above the conveyor. The holder surface is disclosed as being both planar and curved and as having a porous cover of ceramic fibers so as to distribute the vacuum and prevent marring of the glass as it is supported. Auxiliary lifters positioned between the rolls or vertical movement of the vacuum holder facilitates glass pickup. A carrier mold ring moves under the supported glass and the vacuum is then terminated so the glass drops onto the ring and bends under the bias of gravity in a manner that allows thin glass to be accurately bent. Subsequently the mold ring is moved from the furnace to a quench unit that temper the bent glass.
摘要翻译：在炉内的传送带上输送期间对玻璃板进行加热。真空保持器位于输送机上方的炉壳体内，并且具有向下的表面，其具有间隔开的开口，在该开口中抽真空以从输送机接收玻璃板并将片材支撑在输送机上方。公开了保持器表面是平面的和弯曲的，并且具有陶瓷纤维的多孔覆盖物，以便分布真空并防止玻璃被支撑时的损坏。位于辊之间的辅助升降机或真空支架的垂直运动有利于玻璃拾取。载体模具环在支撑的玻璃下移动，然后终止真空，因此玻璃落在环上并且在重力偏压下弯曲，从而允许薄玻璃被精确地弯曲。随后，模具环从炉子移动到淬火单元，该淬火单元调节弯曲的玻璃。

7. 发明授权

US4364765A Apparatus and method for handling heated glass sheets 失效
标题翻译：处理加热玻璃板的装置及方法
公开(公告)号：US4364765A
公开(公告)日：1982-12-21
申请号：US263670
申请日：1981-05-14
申请人： Harold A. McMaster , Norman C. Nitschke , John S. Nitschke
发明人： Harold A. McMaster , Norman C. Nitschke , John S. Nitschke
IPC分类号： C03B23/025 , C03B23/03 , C03B23/035 , C03B27/048 , C03B29/08 , C03B35/14 , C03B35/16 , C03B35/20 , C03B35/24
CPC分类号： C03B23/0357 , C03B23/0252 , C03B23/03 , C03B27/0417 , C03B27/048 , C03B29/08 , C03B35/145 , C03B35/164 , C03B35/202 , C03B35/24 , C03B40/005 , C03B2225/02
摘要： Sheet glass is heated during conveyance within a furnace housing having a fixed roof and vertically movable side doors that define side slots through which ends of conveyor rolls project outwardly to be supported and frictionally driven by continuous drive loops slidably driven over external support surfaces that extend alongside the side slots. A vacuum holder of the apparatus is positioned within the furnace housing above the conveyor and has a downwardly facing surface with spaced openings in which a vacuum is drawn to receive a glass sheet from the conveyor and support the sheet above the conveyor. The holder surface is disclosed as being both planar and curved and as having a porous cover of ceramic fibers so as to distribute the vacuum and prevent marring of the glass as it is supported. A greater vacuum is drawn to initially support the glass and a lesser vacuum is subsequently drawn to prevent glass deformation at the spaced openings. Vertically movable auxiliary lifters positioned between the rolls or vertical movement of the vacuum holder facilitates glass pickup. Sensing of the glass position along the conveyor and operation of a locator cooperatively provide accurate positioning of the glass on the holder surface without requiring the conveyor to be stopped prior to the holder operation. A carrier mold ring moves under the supported glass and the vacuum is then terminated so the glass drops onto the ring and bends under the bias of gravity in a manner that allows thin glass to be accurately bent. Subsequently the mold ring is moved from the furnace to a quench unit between upper and lower blastheads that temper the bent glass. Increased air is then supplied to the low blasthead relative to the upper blasthead to lift the glass sheet off the ring and allow return of the ring to the furnace.
摘要翻译：平板玻璃在具有固定屋顶和可垂直移动的侧门的炉壳中被输送期间被加热，所述炉壳限定侧槽，输送辊的端部通过该侧槽向外突出以被支撑和摩擦地驱动，所述连续驱动环可滑动地驱动在外侧支撑表面上，侧槽。设备的真空保持器位于输送机上方的炉壳体内，并且具有向下的表面，其具有间隔开的开口，在该开口中抽真空以从输送机接收玻璃板并将片材支撑在输送机上方。公开了保持器表面是平面的和弯曲的，并且具有陶瓷纤维的多孔覆盖物，以便分布真空并防止玻璃被支撑时的损坏。拉伸更大的真空以最初支撑玻璃，随后抽取较小的真空以防止间隔开的开口处的玻璃变形。位于辊之间的垂直移动的辅助升降机或真空支架的垂直运动有利于玻璃拾取。传感器沿传送器的位置传感器和定位器的操作协调地提供玻璃在保持器表面上的精确定位，而不需要在保持器操作之前停止输送机。载体模具环在支撑的玻璃下移动，然后终止真空，因此玻璃落在环上并且在重力偏压下弯曲，从而允许薄玻璃被精确地弯曲。随后，模具环从炉子移动到上下旋转头之间的淬火单元，其使弯曲的玻璃变形。然后，相对于上部鼓风头向空泡头提供增加的空气，以将玻璃板从环上提起并允许环返回到炉中。

8. 发明授权

US3957479A Glass treating furnace 失效
标题翻译：玻璃处理炉
公开(公告)号：US3957479A
公开(公告)日：1976-05-18
申请号：US542152
申请日：1975-01-20
申请人： Harold A. McMaster , Norman C. Nitschke
发明人： Harold A. McMaster , Norman C. Nitschke
IPC分类号： C03B27/052 , C03B29/02 , C03B35/20 , C03B29/04
CPC分类号： C03B27/052 , C03B29/025 , C03B35/20
摘要： A furnace for treating glass sheet material and the like in a glass tempering system. The furnace includes an upper glass treating zone and a lower gas treating and distributing zone for homogenizing gases of different temperatures to minimize exposure of the sheet being treated in the treating zone to uneven temperatures. Diametrically opposed inlets and outlets are provided in the side walls controlled by doors, and a slot in the top wall extends between the inlets and outlets to permit movement of a material carrier through the furnace. A pressure chamber communicates with the slot to cool conveyor elements at the top of the furnace, and also to provide a pressure barrier resisting the escape of gases from the furnace through the slots. Air curtains impinge on the tops of the doors in their closed positions to reduce leakage at the top of the doors.
摘要翻译：一种用于在玻璃回火系统中处理玻璃板材等的炉。该炉包括上部玻璃处理区和用于均化不同温度的气体的下部气体处理和分配区，以最小化处理区中被处理的片材暴露于不均匀的温度。直径相对的入口和出口设置在由门控制的侧壁中，并且顶壁中的狭槽在入口和出口之间延伸以允许材料载体移动通过炉。压力室与槽连通以冷却炉顶部的输送机元件，并且还提供阻止气体从炉通过狭槽逸出的压力屏障。气帘在其关闭位置撞击门顶部，以减少门顶部的泄漏。

9. 发明授权

US3934970A Glass tempering system 失效
标题翻译：玻璃回火系统
公开(公告)号：US3934970A
公开(公告)日：1976-01-27
申请号：US551435
申请日：1975-02-19
申请人： Harold A. McMaster , Norman C. Nitschke
发明人： Harold A. McMaster , Norman C. Nitschke
IPC分类号： C03B25/08 , C03B27/044 , C03B29/08 , C03B35/16 , F27B9/24 , F27B9/00 , C03B25/04
CPC分类号： C03B29/08 , C03B27/044 , C03B35/163 , C03B35/165
摘要： A glass tempering system including a roller hearth furnace that has a conveyor with elongated rollers extending through an elongated heating chamber of the furnace and outwardly through elongated slots in the sides of the furnace so as to be supported on drive belts which are slidably driven along support surfaces to thereby frictionally drive the rollers and convey glass sheets over the rollers through the heating chamber. The furnace is of a modular construction and includes upper and lower housing portions with inner layers of refractory material that define the heating chamber. Flanges of the refractory material cooperate to define the elongated slots at the sides of the furnace. Heat seal arrangements extend between the refractory flanges and the conveyor rollers to mitigate heat flow from the furnace during use. A first electric motor drive mechanism drives belt sheaves that receive the drive belt at the end of the furnace where glass enters the heating chamber. Vertical support members carry belt sheaves receiving the drive belts at the other end of the furnace and are hydraulically positioned to control the tension of the belts. A secondary conveyor of the system receives the heated glass sheets after leaving the furnace and carries them through quench and cooling units of the system. The secondary conveyor is driven by a second electric motor drive mechanism which is coupled to the first conveyor to tension portions of the furnace conveyor drive belts in a manner that increases the driving force the first drive mechanism can impart to its drive belts. The secondary conveyor includes a pair of continuous drive chains that frictionally drive rollers of this conveyor in a manner similar to the driving of the furnace conveyor rollers. The tension of the secondary conveyor chains is hydraulically controlled.
摘要翻译：一种玻璃回火系统，其包括具有延伸通过炉的细长加热室的细长辊的输送机，并且通过炉的两侧的细长槽向外延伸，以便被支撑在驱动带上，所述驱动带沿着支撑从而摩擦地驱动辊子，并将玻璃板在辊子上传送通过加热室。炉是模块化结构，并且包括具有限定加热室的耐火材料内层的上部和下部壳体部分。耐火材料的法兰配合以在炉的侧面限定细长槽。热密封装置在耐火法兰和输送辊之间延伸，以减轻在使用过程中从炉子流出的热量。第一电动机驱动机构驱动皮带轮，其接收在玻璃进入加热室的炉的端部处的传动带。垂直支撑构件承载在炉的另一端处接收传动带的皮带轮，并且液压地定位以控制带的张力。系统的二次输送机在离开炉子后接收加热的玻璃板，并通过系统的淬火和冷却单元进行运送。辅助输送机由第二电动机驱动机构驱动，第二电动机驱动机构联接到第一输送机，以增加第一驱动机构可以赋予其传动带的驱动力的方式张紧炉输送带驱动带的部分。次级输送机包括一对连续的驱动链，其以类似于炉输送辊的驱动的方式摩擦地驱动该输送机的辊。二次输送链的张力是液压控制的。

10. 发明授权

US4437871A Apparatus and method for bending glass sheets 失效
标题翻译：玻璃板弯曲装置及方法
公开(公告)号：US4437871A
公开(公告)日：1984-03-20
申请号：US263626
申请日：1981-05-14
申请人： Harold A. McMaster , Norman C. Nitschke , John S. Nitschke
发明人： Harold A. McMaster , Norman C. Nitschke , John S. Nitschke
IPC分类号： C03B23/025 , C03B23/03 , C03B23/035 , C03B27/048 , C03B29/08 , C03B35/14 , C03B35/16 , C03B35/20 , C03B35/24
CPC分类号： C03B23/0357 , C03B23/0252 , C03B23/03 , C03B27/0417 , C03B27/048 , C03B29/08 , C03B35/145 , C03B35/164 , C03B35/202 , C03B35/24 , C03B40/005 , C03B2225/02
摘要： Sheet glass is heated during conveyance within a furance housing having a fixed roof and vertically movable side doors that define side slots through which ends of conveyor rolls project outwardly to be supported and frictionally driven by continuous drive loops slidably driven over external support surfaces that extend alongside the side slots. A vacuum holder of the apparatus is positioned within the furnace housing above the conveyor and has a downwardly facing surface with spaced openings in which a vacuum is drawn to receive a glass sheet from the conveyor and support the sheet above the conveyor. The holder surface is disclosed as being both planar and curved and as having a porous cover of ceramic fibers so as to distribute the vacuum and prevent marring of the glass as it is supported. A greater vacuum is drawn to initially support the glass and a lesser vacuum is subsequently drawn to prevent glass deformation at the spaced openings. Vertically movable auxiliary lifters positioned between the rolls or vertical movement of the vacuum holder facilitates glass pickup. Sensing of the glass position along the conveyor and operation of a locator cooperatively provide accurate positioning of the glass on the holder surface without requiring the conveyor to be stopped prior to the holder operation. A carrier mold ring moves under the supported glass and the vacuum is then terminated so the glass drops onto the ring and bends under the bias of gravity in a manner that allows thin glass to be accurately bent. Subsequently the mold ring is moved from the furnace to a quench unit between upper and lower blastheads that temper the bent glass. Increased air is then supplied to the lower blasthead relative to the upper blasthead to lift the glass sheet off the ring and allow return of the ring to the furnace.
摘要翻译：平板玻璃在具有固定屋顶和可垂直移动的侧门的保护壳体内被加热，该侧门限定了侧槽，输送机的端部通过该侧槽向外突出以被支撑和摩擦地驱动，所述连续驱动环可滑动地驱动在外侧支撑表面上，侧槽。设备的真空保持器位于输送机上方的炉壳体内，并且具有向下的表面，其具有间隔开的开口，在该开口中抽真空以从输送机接收玻璃板并将片材支撑在输送机上方。公开了保持器表面是平面的和弯曲的，并且具有陶瓷纤维的多孔覆盖物，以便分布真空并防止玻璃被支撑时的损坏。拉伸更大的真空以最初支撑玻璃，随后抽取较小的真空以防止间隔开的开口处的玻璃变形。位于辊之间的垂直移动的辅助升降机或真空支架的垂直运动有利于玻璃拾取。传感器沿传送器的位置传感器和定位器的操作协调地提供玻璃在保持器表面上的精确定位，而不需要在保持器操作之前停止输送机。载体模具环在支撑的玻璃下移动，然后终止真空，因此玻璃落在环上并且在重力偏压下弯曲，从而允许薄玻璃被精确地弯曲。随后，模具环从炉子移动到上下旋转头之间的淬火单元，其使弯曲的玻璃变形。然后，相对于上部鼓风头将增加的空气供应到下部鼓风头，以将玻璃板从环上提起并允许将环返回到炉中。

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