| 主权项 |
1. A thermoforming chain rail assembly, comprising:
a chain having a series of alternating and interconnected roller links and pin links,
a) the roller link having a first bushing and a second bushing coupling together a first roller link plate with a parallel second roller link plate, a first roller and a second roller provided about the first bushing and the second bushing between the first roller link plate and the second roller link plate,b) the pin link having a first elongate pin and a second elongate pin coupling together a first pin link plate and a second pin link plate while overlapping the first roller link plate and the second roller link plate, the first elongate pin passing through the second bushing of the roller link and the second elongate pin passing through a first bushing of another roller link, the first elongate pin and the second elongate pin each extending through and beyond the first pin link plate and receiving a pin roller thereabout captured on each respective pin for rotation;c) a spike extending upwardly from one of the second roller link plate and the second pin link plate; and a chain rail having an upper conveying raceway and a lower return raceway, the upper raceway including a first linear guide surface provided beneath the first roller of each chain link and a second linear guide surface provided above the second roller of each chain link. |
