Cigarette perforation apparatus and method

Details Cigarette perforation apparatus and method Cigarette perforation apparatus and method

1990-04-26

1991-10-01

Millin, V.

Tobacco

Cigar or cigarette making

Including perforating

A24C 138

Patent

active

050524143

ABSTRACT:
Various arrangements are disclosed for perforation by laser of cigarettes carried on a fluted drum without rolling. In one arrangement (FIGS. 1-3) rings of reflectors (8, 14) movable with the drum (12) intercept and direct a continuous laser beam (18). In another arrangement (FIGS. 4,5) cigarettes (28) are perforated while being conveyed past a fixed focus pulsed beam (32) which has a selected profile and is redirected between passing cigarettes to perforate cigarette at other positions. Other arrangements include using a rotating disc (FIGS. 6-8) or rotary stepped reflector (FIGS. 9, 13, 14) to share a beam between different cigarettes or produce two rows of perforations on a cigarette, using a continuous reflective surface (FIGS. 10, 11) to reflect a rotating beam at passing cigarettes, and causing a beam to partially track a moving cigarette (FIG. 12).

REFERENCES:
patent: 4524785 (1985-06-01), Seragnoli et al.
patent: 4648412 (1987-03-01), Heitmann

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