EP 0234105 A1 19870902 - Mold identification.
Title (en)
Mold identification.
Title (de)
Form-Identifizierung.
Title (fr)
Identification de moule.
Publication
Application
Priority
US 81485385 A 19851230
Abstract (en)
A mold number reader foe detecting code marks (15) at the heel of a transparent bottle or the like, such code marks desirable being in the form of dots or balls protruding from the bottle's heel. During rotation of the bottle, its heel portion is illuminated with a structured collimated light beam (40) in the form of a narrow rectangle, which light is selectively reflected by code marks and collected by field-type optics (60, 65). The use of a well defined collimated light source of small area provides a high input signal level, while the field optics enjoys a high depth of field and hence decreased sensititivity to bottle placement during inspection. The light source may be a modulated laser diode (25) and the signal processing electronics may include a demodulator (120) to process the photodetector (70) output signal. The use of heterodyned signal processing decreases the sensitivity to ambient light and other sources of noise in the output signal.
IPC 1-7
IPC 8 full level
CPC (source: EP)
B07C 5/3412 (2013.01)
Citation (search report)
- [XD] US 4201338 A 19800506 - KELLER RENE [CH]
- [A] FR 2234613 A1 19750117 - PLATMANUFAKTUR AB [SE]
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0234105 A1 19870902; AU 579755 B2 19881208; AU 6610686 A 19870702; CN 86108879 A 19870826; JP S62159288 A 19870715
DOCDB simple family (application)
EP 86309371 A 19861202; AU 6610686 A 19861204; CN 86108879 A 19861229; JP 29458986 A 19861210