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1. US5178262 - Sheet transporting tongs for use in chain conveyors and the like

Office United States of America
Application Number 07720772
Application Date 08.07.1991
Publication Number 5178262
Publication Date 12.01.1993
Grant Number 5178262
Grant Date 12.01.1993
Publication Kind A
IPC
B PERFORMING OPERATIONS; TRANSPORTING
65
CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
G
TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
17
Conveyers having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyers in which the chains form the load-carrying surface
30
Details; Auxiliary devices
B PERFORMING OPERATIONS; TRANSPORTING
65
CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
G
TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
17
Conveyers having an endless traction element, e.g. a chain, transmitting movement to a continuous or substantially-continuous load-carrying surface or to a series of individual load-carriers; Endless-chain conveyers in which the chains form the load-carrying surface
30
Details; Auxiliary devices
46
Means for holding or retaining the loads in fixed position on the load-carriers, e.g. magnetic
B PERFORMING OPERATIONS; TRANSPORTING
65
CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
H
HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
29
Delivering or advancing articles from machines; Advancing articles to or into piles
02
by mechanical grippers engaging the leading edge only of the articles
B PERFORMING OPERATIONS; TRANSPORTING
65
CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
H
HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
29
Delivering or advancing articles from machines; Advancing articles to or into piles
02
by mechanical grippers engaging the leading edge only of the articles
04
the grippers being carried by endless chains or bands
B65G 17/30
B65G 17/46
B65H 29/02
B65H 29/04
CPC
B65H 29/003
B65H 2402/546
Applicants Grapha-Holding AG
Inventors Merkli Peter
Eugster Albert
Oppliger Jean-Claude
Agents Kontler Peter K.
Priority Data 00402389 08.11.1989 CH
Title
(EN) Sheet transporting tongs for use in chain conveyors and the like
Abstract
(EN)

Tongs for releasably clamping newspapers or other sheet-like commodities for movement with a conveyor have a housing connectable to the conveyor, a first jaw provided on the housing, a second jaw which is pivotable in or on the housing between open and closed positions adjacent and remote from the first jaw, respectively, and a mechanism for pivoting the second jaw. The mechanism employs a lever which is pivotable relative to the housing with and with respect to the second jaw between first and second end positions which respectively correspond to the open and closed positions of the second jaw, one or more springs which oppose pivotal movements of the lever relative to the second jaw during pivoting of the lever to its second end position, and a motion transmitting unit which operates between the lever and the spring or springs and is caused to move through a dead-center position during each movement of the lever between its first and second end positions. The unit can comprise a toggle joint or a cam and cam follower.