Web aligning process and apparatus

An apparatus for aligning at least two running webs to be glued together with each other in the production of corrugated fiberboard, said apparatus comprising:

• two web position detectors provided adjacent to a gluing station for detecting the lateral positions of the respective webs,
• a computing means for combining the signals from said web position detectors to generate a difference signal proportional to the difference therebetween,
• web moving means disposed at a position at a predetermined distance upstream of the detection point for correcting any lateral displacement of one web in relation to the other,
• a moved distance detector means for generating a signal proportional to the distance for which the web has been moved by said web moving means,
• READY signal generator means for generating a first READY signal from when the web corrected has run at least for said predetermined distance after the last correction of displacement and generating a second READY signal at least from when a spliced point has passed the detection point after splicing of one web to the other web, and
• a timing controller which in the presence of said first READY signal gives a timing signal until the signal from said moved distance detector means becomes equal to said difference signal,
• said web moving means operating while it receives said timing signal and said second READY signal.