A glass manufacturing apparatus (100, 100a) comprising: a forming device configured to produce a glass ribbon including a width extending between a first edge portion and a second edge portion; and a pull roll device (114, 114a, 114b, 114c, 114d) comprising: a first roll apparatus (202, 202') including a first upstream pair of draw rolls (210, 210') configured to draw the first edge portion of the glass ribbon from the forming device along a draw path extending transverse to the width of the glass ribbon; a second roll apparatus (204, 204') including a first midstream pair of rolls (216, 216') positioned downstream along the draw path from the first upstream pair of draw rolls, wherein the first midstream pair of rolls are configured to interact with the first edge portion of the glass ribbon; a third roll apparatus (206, 206') including a first downstream pair of draw rolls (220, 220') positioned downstream along the draw path from the first midstream pair of rolls, wherein the first downstream pair of draw rolls are configured to further draw the first edge portion of the glass ribbon along the draw path; and a control device (208, 208'), characterised in that the control device is configured to independently operate at least the first roll apparatus and the third roll apparatus such that at least one of the first upstream pair of draw rolls rotates with a substantially constant torque and at least one of the first downstream pair of draw rolls rotates with a substantially constant angular velocity. a forming device configured to produce a glass ribbon including a width extending between a first edge portion and a second edge portion; and a pull roll device (114, 114a, 114b, 114c, 114d) comprising: a first roll apparatus (202, 202') including a first upstream pair of draw rolls (210, 210') configured to draw the first edge portion of the glass ribbon from the forming device along a draw path extending transverse to the width of the glass ribbon; a second roll apparatus (204, 204') including a first midstream pair of rolls (216, 216') positioned downstream along the draw path from the first upstream pair of draw rolls, wherein the first midstream pair of rolls are configured to interact with the first edge portion of the glass ribbon; a third roll apparatus (206, 206') including a first downstream pair of draw rolls (220, 220') positioned downstream along the draw path from the first midstream pair of rolls, wherein the first downstream pair of draw rolls are configured to further draw the first edge portion of the glass ribbon along the draw path; and a control device (208, 208'), a first roll apparatus (202, 202') including a first upstream pair of draw rolls (210, 210') configured to draw the first edge portion of the glass ribbon from the forming device along a draw path extending transverse to the width of the glass ribbon; a second roll apparatus (204, 204') including a first midstream pair of rolls (216, 216') positioned downstream along the draw path from the first upstream pair of draw rolls, wherein the first midstream pair of rolls are configured to interact with the first edge portion of the glass ribbon; a third roll apparatus (206, 206') including a first downstream pair of draw rolls (220, 220') positioned downstream along the draw path from the first midstream pair of rolls, wherein the first downstream pair of draw rolls are configured to further draw the first edge portion of the glass ribbon along the draw path; and a control device (208, 208'), characterised in that the control device is configured to independently operate at least the first roll apparatus and the third roll apparatus such that at least one of the first upstream pair of draw rolls rotates with a substantially constant torque and at least one of the first downstream pair of draw rolls rotates with a substantially constant angular velocity.