A professional who feeds sheets of glass onto conveyor type, plaster-covered table that carries sheets into grinding machine. Responsibilities include:

• Climbs onto table and receives glass from workers on floor.
• Lowers ends simultaneously onto table to avoid cracking sheet.
• Positions sheets end to end so that edges will not be chipped or glass cracked as glass passes beneath grinding heads.
• Raises glass and scoops more plaster under edges to level sheets.
• Pulls roller over glass sheets to settle them in and remove air bubbles from plaster.