A position of a band-shaped glass film (1) conveyed downward in a vertical direction is detected by a detection unit (21), and the conveyance speed of each of a plurality of conveyance devices (10, 11, 12, and 14) provided in a horizontal conveyance path (R2) is controlled based on detection data in the detection unit (21). Under a condition that, of the plurality of conveyance devices (10, 11, 12, and 14), the conveyance device (10) located on a most upstream side is defined as an upstream side conveyance device, and the conveyance devices (11, 12, and 14) on a downstream side of the upstream side conveyance device (10) are defined as downstream side conveyance devices, an upper limit and a lower limit are set to the conveyance speed of each of the downstream side conveyance devices (11, 12, and 14).

A method for producing a glass article includes a forming step (P1) of forming a glass ribbon (2) from a molten glass (6) and a transport step (P2) of transporting the glass ribbon (2) along a transport path. In the transport step (P2), a first roller (9a) and a second roller (9b) configured to transport the glass ribbon (2) while in contact with a first end portion (2s) and a second end portion (2t) of the glass ribbon (2) in the width direction, respectively, are disposed, and a speed difference is provided between the first roller (9a) and the second roller (9b).

Apparatus and methods for processing a glass sheet that includes a threading tool movable between an open position and a closed position, a glass sensor, a gripping device sensor and a controller in communication with the glass sensor and the gripping device sensor, and configured to coordinate and control movement of the threading tool between the open position and the closed position based on the detected presence of the glass sheet and the detected presence of the gripping device. A control system is also provided.

A plate glass tempering cooling system includes an air collecting box, an air grid, and a conveying roller. An air inlet of the air collecting box is in communication with an air supply device, and the air collecting box and the air grid are connected through several ventilation tubes. The system further includes: a damper, configured to open or close the ventilation tubes; a driving mechanism, configured to drive the damper to control closing and an opening range of the damper; an encoder, configured to monitor information about a movement position of a plate glass on the conveying roller; and a control unit, configured to receive position information of the plate glass that is fed back by the encoder, and send an instruction to the driving mechanism to control the closing and the opening range of the damper.

Provided is a method for manufacturing a glass substrate, comprising steps of: cooling a glass substrate transported by a plurality of rollers rotating at a predetermined speed; predicting a crack defect rate of the glass substrate in accordance with a plurality of predictive factors related to crack defects of the glass substrate and rotational speed information of the respective rollers, in the transport process; and adjusting the rotational speed of each roller so that the crack defect rate of the glass substrate is lowered. Also provided is an apparatus for manufacturing a glass substrate, comprising a transport part for cooling a glass substrate transported by a plurality of rollers rotating at a predetermined speed, a prediction part for predicting a crack defect rate of the glass substrate through a partial least squares regression analysis, and a control part for controlling the rotation speed of each roller.

An optical device comprises a first polariscope and a set of first photodetectors and an optical retardation generator. The device is configured to analyze the quality of a glazing.

Disclosed in the present invention is an apparatus for eliminating stress spots on a surface of glass, comprising a conveying assembly, provided with a conveying surface for reciprocally conveying the glass along a conveying direction; an upper air-blowing assembly, provided above the conveying surface, used for guiding air to reciprocally flow above the conveying surface along a swinging direction extending along a width direction of the glass; and a lower air-blowing assembly, provided under the conveying surface, used for guiding air to reciprocally flow under the conveying surface along the swinging direction. A method for eliminating stress spots on a surface of glass comprises a conveying step, a glass swinging step, and an air-cooling step.

A glass heating furnace is disclosed, comprising a furnace body, an interior of which is formed with a chamber; plural upper heating elements which are disposed in the chamber; plural lower heating elements, which are disposed in the chamber and are located oppositely below the upper heating elements; plural rollers, which are disposed in the chamber and are locate between the upper heating elements and the lower heating element to carry glass to be heated up; and a roller power module, which is disposed outside the furnace body and is connected with the rollers. The rollers are controlled by the roller power module to rotate clockwise and counterclockwise, driving glass to displace along a transversal direction. In addition, the upper heating elements and the lower heating elements are arranged in the chamber alternatingly and asymmetrically at an upper and lower position.

A glass heating furnace is disclosed, comprising a furnace body, an interior of which is formed with a chamber; plural upper heating elements which are disposed in the chamber; plural lower heating elements, which are disposed in the chamber and are located oppositely below the upper heating elements; plural rollers, which are disposed in the chamber and are locate between the upper heating elements and the lower heating element to carry glass to be heated up; and a roller power module, which is disposed outside the furnace body and is connected with the rollers. The rollers are controlled by the roller power module to rotate clockwise and counterclockwise, driving glass to displace along a transversal direction. In addition, the upper heating elements and the lower heating elements are arranged in the chamber alternatingly and asymmetrically at an upper and lower position.

A glass heating furnace is disclosed. The glass heating furnace allows glass to be heated up more uniformly, which reduces effectively the formation of the thermal stress marks on the glass. The glass heating furnace uses primarily a roller power module to control the rollers to displace reciprocatively, allowing the glass to be heated up uniformly and reducing significantly the formation of the thermal stress marks in the heating process of the glass, through the reciprocative displacement of the rollers. A glass is made by the glass heating furnace. The glass displaces in a chamber of the glass heating furnace along an S-shaped moving path or an 8-shaped moving path.