什么是(shi)裹背(bei)條(tiao)，裹背(bei)條(tiao)是(shi)通過皮殼(ke)機等機械用于精裝(zhuang)書(shu)本的(de)書(shu)脊部(bu)分，使書(shu)貼連接得更(geng)加牢固。書(shu)脊制(zhi)作弧長的(de)計算(suan)，本器規(gui)格(ge)依書(shu)芯(xin)幅面(mian)大小(xiao)進行調定，以能將書(shu)芯(xin)平(ping)穩地(di)(di)送進夾書(shu)裝(zhuang)置(zhi)(zhi)內為(wei)標準。入本后的(de)書(shu)冊不(bu)斜歪，四(si)角垂直(zhi)地(di)(di)頂齊(qi)在(zai)夾書(shu)裝(zhuang)置(zhi)(zhi)的(de)靠(kao)板、側規(gui)內。裁切(qie)尺寸正確一(yi)致(zhi)，其質(zhi)量要求與規(gui)格(ge)誤差與一(yi)般(ban)切(qie)書(shu)相同。

夾書簽絲(si)帶(dai)(dai)裝置安放在切書機與扒圓起脊機之間。即(ji)將(jiang)切完的(de)書芯(xin)，用(yong)分(fen)本器從(cong)中間分(fen)開，再由輸放絲(si)帶(dai)(dai)器將(jiang)絲(si)帶(dai)(dai)夾入中心紙書芯(xin)的(de)中間靠(kao)訂縫一(yi)邊。絲(si)帶(dai)(dai)夾在書芯(xin)內兩(liang)端各留出粘(zhan)邊和使(shi)用(yong)的(de)余地，再經切刀(dao)（剪(jian)刀(dao)式(shi)）將(jiang)其剪(jian)斷。

剪斷(duan)后(hou)(hou)(hou)的(de)絲(si)帶，裹背(bei)(bei)(bei)條(tiao)芯部分(fen)被下面膠(jiao)輥著膠(jiao)、壓實完(wan)成(cheng)夾(jia)書(shu)(shu)(shu)(shu)簽絲(si)帶過程。書(shu)(shu)(shu)(shu)簽絲(si)帶的(de)長(chang)(chang)度(du)與(yu)一般手工加(jia)(jia)工長(chang)(chang)度(du)基本相(xiang)同，可依書(shu)(shu)(shu)(shu)冊幅(fu)面長(chang)(chang)度(du)調定。扒(ba)(ba)(ba)(ba)(ba)圓(yuan)(yuan)(yuan)起脊(ji)操(cao)(cao)作(zuo)及(ji)要求。書(shu)(shu)(shu)(shu)芯經裁切、夾(jia)粘絲(si)帶（或(huo)不夾(jia)粘絲(si)帶）后(hou)(hou)(hou)，繼續(xu)傳送（或(huo)翻轉(zhuan)變位(wei)）并做90°翻轉(zhuan)，使平放書(shu)(shu)(shu)(shu)芯變為(wei)后(hou)(hou)(hou)背(bei)(bei)(bei)朝(chao)上（或(huo)朝(chao)下）而(er)進入扒(ba)(ba)(ba)(ba)(ba)圓(yuan)(yuan)(yuan)起脊(ji)機。扒(ba)(ba)(ba)(ba)(ba)圓(yuan)(yuan)(yuan)起脊(ji)機的(de)加(jia)(jia)工，其(qi)操(cao)(cao)作(zuo)分(fen)為(wei)兩(liang)步，但機器的(de)結構是(shi)(shi)連在(zai)一起的(de)，均是(shi)(shi)先扒(ba)(ba)(ba)(ba)(ba)圓(yuan)(yuan)(yuan)后(hou)(hou)(hou)起脊(ji)。扒(ba)(ba)(ba)(ba)(ba)圓(yuan)(yuan)(yuan)。扒(ba)(ba)(ba)(ba)(ba)圓(yuan)(yuan)(yuan)起脊(ji)機在(zai)扒(ba)(ba)(ba)(ba)(ba)圓(yuan)(yuan)(yuan)時(shi)，由(you)一組（或(huo)一對(dui)）圓(yuan)(yuan)(yuan)輥，將書(shu)(shu)(shu)(shu)芯壓緊后(hou)(hou)(hou)作(zuo)相(xiang)對(dui)旋(xuan)轉(zhuan)動作(zuo)），使書(shu)(shu)(shu)(shu)背(bei)(bei)(bei)扒(ba)(ba)(ba)(ba)(ba)成(cheng)適當規格(ge)圓(yuan)(yuan)(yuan)勢，加(jia)(jia)工成(cheng)圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)書(shu)(shu)(shu)(shu)芯。書(shu)(shu)(shu)(shu)芯書(shu)(shu)(shu)(shu)背(bei)(bei)(bei)的(de)形狀分(fen)為(wei)圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)有脊(ji)、圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)無脊(ji)和方(fang)背(bei)(bei)(bei)（或(huo)稱(cheng)平背(bei)(bei)(bei)）三種。平裝裹背(bei)(bei)(bei)條(tiao)書(shu)(shu)(shu)(shu)刊(kan)的(de)書(shu)(shu)(shu)(shu)脊(ji)不高出書(shu)(shu)(shu)(shu)芯平面，而(er)精裝書(shu)(shu)(shu)(shu)刊(kan)的(de)書(shu)(shu)(shu)(shu)脊(ji)一般要高出書(shu)(shu)(shu)(shu)芯的(de)平面。書(shu)(shu)(shu)(shu)脊(ji)分(fen)為(wei)真脊(ji)和假脊(ji)。

真脊是利用書(shu)(shu)背(bei)上下兩邊變(bian)形(xing)的(de)弧(hu)度高(gao)(gao)出書(shu)(shu)芯(xin)平面(mian)；假脊則是利用紙板鑲在書(shu)(shu)背(bei)后(hou)形(xing)成的(de)書(shu)(shu)脊，書(shu)(shu)脊的(de)脊高(gao)(gao)等于封面(mian)紙板的(de)厚(hou)度。方(fang)背(bei)書(shu)(shu)芯(xin)。是指書(shu)(shu)芯(xin)的(de)書(shu)(shu)背(bei)平直(zhi)方(fang)正(zheng)。書(shu)(shu)背(bei)不突出，與平裝書(shu)(shu)刊的(de)書(shu)(shu)背(bei)基本相似。

背(bei)(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)上(shang)下(xia)環襯互成(cheng)直角，由于精(jing)裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)是用鎖線訂訂連，每一(yi)個書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖的(de)(de)(de)(de)訂口折縫里面都用線串過(guo)，因此，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)背(bei)(bei)(bei)(bei)(bei)脊(ji)(ji)比書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖其(qi)它部分要厚(hou)一(yi)些，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)的(de)(de)(de)(de)帖數越多，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)背(bei)(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)其(qi)它部分厚(hou)度(du)的(de)(de)(de)(de)差別也越大(da)。所以方(fang)背(bei)(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)的(de)(de)(de)(de)形(xing)(xing)式一(yi)般只用于厚(hou)度(du)約為20mm的(de)(de)(de)(de)精(jing)裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)。圓(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)有(you)(you)脊(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)。圓(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)有(you)(you)脊(ji)(ji)又稱圓(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)真脊(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)背(bei)(bei)(bei)(bei)(bei)部呈圓(yuan)(yuan)(yuan)(yuan)(yuan)弧形(xing)(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)高(gao)起有(you)(you)脊(ji)(ji)壟，堅硬(ying)挺實，這種(zhong)(zhong)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)(bei)的(de)(de)(de)(de)形(xing)(xing)式適合于裝(zhuang)訂較厚(hou)的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)，裝(zhuang)上(shang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)后有(you)(you)明顯的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)槽，翻閱方(fang)便。目前我國的(de)(de)(de)(de)精(jing)裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)多采用這種(zhong)(zhong)圓(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)有(you)(you)脊(ji)(ji)的(de)(de)(de)(de)加工形(xing)(xing)式。圓(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)無脊(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)。圓(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)無脊(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)又稱圓(yuan)(yuan)(yuan)(yuan)(yuan)背(bei)(bei)(bei)(bei)(bei)假脊(ji)(ji)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)背(bei)(bei)(bei)(bei)(bei)部呈圓(yuan)(yuan)(yuan)(yuan)(yuan)弧形(xing)(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)(bei)與書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)的(de)(de)(de)(de)厚(hou)度(du)相(xiang)同，堅實挺括，但沒(mei)(mei)有(you)(you)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)裹背(bei)(bei)(bei)(bei)(bei)條脊(ji)(ji)。這種(zhong)(zhong)形(xing)(xing)式的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)，一(yi)般常與軟質書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)或(huo)塑料(liao)壓制(zhi)而(er)成(cheng)的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼(ke)相(xiang)配套(tao)。中(zhong)心紙(zhi)有(you)(you)些機器(qi)還沒(mei)(mei)有(you)(you)沖(chong)圓(yuan)(yuan)(yuan)(yuan)(yuan)裝(zhuang)置，即將方(fang)背(bei)(bei)(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)先(xian)進行沖(chong)圓(yuan)(yuan)(yuan)(yuan)(yuan)加工，作初步定(ding)型。先(xian)根據書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)厚(hou)度(du)和中(zhong)心紙(zhi)幅面大(da)小調定(ding)好(hao)夾(jia)(jia)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器(qi)及扒(ba)圓(yuan)(yuan)(yuan)(yuan)(yuan)輥（或(huo)沖(chong)圓(yuan)(yuan)(yuan)(yuan)(yuan)裝(zhuang)置）的(de)(de)(de)(de)規(gui)矩，再使(shi)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)進入夾(jia)(jia)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器(qi)內并(bing)送到扒(ba)圓(yuan)(yuan)(yuan)(yuan)(yuan)輥之間，將書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)(bei)(bei)扒(ba)擠成(cheng)一(yi)定(ding)圓(yuan)(yuan)(yuan)(yuan)(yuan)勢。